Casino Glossary | 60+ Gambling Terms Explained | Flush

Casino Glossary: 60+ Gambling Terms Explained

Whether you’re new to online gambling or returning after a break, casino vocabulary can feel overwhelming. This A-Z glossary covers 60+ terms you’ll encounter at Flush.com, from basic slot mechanics to crypto concepts, table game decisions to responsible gambling tools. Each definition is written in plain English with no jargon left unexplained.

A

Autoplay A slot feature that automatically plays a set number of spins at your chosen bet size without manual input. Most autoplay functions include configurable stop conditions such as stopping on a win above a certain amount or stopping when a bonus triggers. Always set a loss limit when using autoplay.

Ante A mandatory bet placed before a hand begins in certain poker variants and casino table games. The ante ensures there is always something in the pot before cards are dealt.

B

Bankroll The total amount of money or cryptocurrency a player has set aside specifically for gambling. Separate from everyday finances. Good bankroll management treats this as a fixed pool to be managed carefully across multiple sessions.

Bet Max A button in slot games that automatically sets the bet to the highest possible amount. Useful for players with large bankrolls seeking maximum win potential, but dangerous for those playing near their budget limits.

Blackjack (Natural) A starting hand consisting of an Ace plus any 10-value card (10, J, Q, K). Pays 3:2 in standard blackjack. Beats any dealer total including dealer 21 (dealer 21 without a natural results in a push if the player holds a natural, not a player loss).

Blockchain The distributed ledger technology underlying cryptocurrencies. All crypto transactions, including deposits and withdrawals at Flush, are recorded on the relevant blockchain, providing transparency and immutability.

Bonus Round A secondary game or feature within a slot that typically offers the largest winning potential. Triggered by landing specific symbols (usually scatters). Examples include free spins rounds, pick-me games, wheel spins, and hold-and-win features.

Bust In blackjack, when a hand total exceeds 21. A player who busts loses immediately, regardless of the dealer’s hand. This is the fundamental asymmetry that gives the casino its edge: players act first.

Buy Feature (Bonus Buy) An optional purchase in certain slot games allowing direct entry to the bonus round without waiting for organic scatter triggers. Typically costs 80–150x the current bet. Where available, it trades patience for immediacy at a cost.

C

Call In poker, matching the current bet to remain in the hand. In blackjack, this term is not used (see Hit, Stand).

Cluster Pays A win mechanic in slot games where wins are formed by groups of matching symbols touching horizontally or vertically (typically 5+ symbols) rather than paylines or ways. Games like Jammin’ Jars and Reactoonz use cluster pays.

Community Cards In poker variants like Texas Hold’em, cards dealt face-up in the center of the table and shared by all players. Includes the Flop (3 cards), Turn (1 card), and River (1 card).

Confirmation In blockchain transactions, a confirmation occurs each time a new block is added to the chain after the block containing your transaction. More confirmations = higher security. Most crypto deposits at Flush are credited after 1–3 confirmations.

D

Deposit Adding funds to your casino account. At Flush, crypto deposits arrive in under 60 seconds for most currencies. Supported cryptos: BTC, ETH, BNB, LTC, USDT, USDC, TRX, SOL, POL, DOGE.

Double Down A blackjack action where you double your original bet and receive exactly one more card, ending your turn. Optimal in specific situations defined by basic strategy (e.g., hard 11 vs dealer 5).

E

En Prison A French roulette rule. If zero comes up on an even-money bet, instead of losing, the bet is held “in prison” for one more spin. If the bet wins on the next spin, the stake is returned in full. Functionally similar to La Partage in reducing the house edge.

Expanding Wild A wild symbol that expands to cover an entire reel after landing, increasing the chances of completing winning combinations. Common in NetEnt slots.

F

Fiat Traditional government-issued currencies (USD, EUR, GBP, etc.) as distinguished from cryptocurrencies. Flush operates as a crypto-native casino, deposits and withdrawals are processed in cryptocurrency, not fiat.

Fixed Payline A payline that is always active regardless of bet size. Most modern slots have fixed paylines, you cannot reduce the number of active lines. The bet-per-line amount varies with your total bet selection.

Fold In poker, discarding your hand and forfeiting any bets placed. You are out of the current hand but protected from further losses.

Free Spins Extra spins awarded without deducting from a player’s balance. Typically triggered by scatter symbols (3+ required). Often include enhanced mechanics not present in the base game, extra wilds, multipliers, upgraded features.

G

GamCare A UK-based charity providing support, information, and advice to anyone affected by problem gambling. Flush is committed to GamCare standards for responsible gaming. Website: www.gamcare.org.uk.

Gas Fee The transaction fee paid to network validators when sending cryptocurrency. Paid to the blockchain network, not to Flush. Gas fees vary by network and congestion. ETH gas fees are typically higher than TRX or POL fees.

H

Hard Hand In blackjack, a hand with no Ace, or a hand where the Ace must count as 1 to avoid busting. Hard 16 (e.g., 9+7) requires a different strategy than soft 16 (Ace+5).

Hit The blackjack action of requesting an additional card from the dealer. You can hit multiple times until you stand or bust.

Hit Rate The frequency at which a slot game produces any win during a spin, expressed as a percentage. A slot with a 25% hit rate produces a win on 1 in 4 spins on average. Higher hit rates typically indicate lower volatility.

Hold and Win A bonus feature in slot games where qualifying symbols (typically coins or gems with values) “hold” in place while the player receives 3 re-spins. Landing additional qualifying symbols resets the re-spin counter to 3. Popular in Pragmatic Play and Red Tiger games.

House Edge The mathematical advantage the casino holds over the player on any given game, expressed as a percentage of each bet. European roulette: 2.70%. American roulette: 5.26%. Blackjack with basic strategy: ~0.5%. The house edge means players lose a small percentage of total wagers over time.

L

La Partage A French roulette rule where if zero comes up on an even-money bet, the player receives half their stake back. This halves the house edge on even-money bets from 2.70% to 1.35%, the best odds available in roulette.

Labouchere A negative progression betting system where the player writes a sequence of numbers and bets the sum of the first and last. Won bets cancel numbers, lost bets add to the sequence. See our Roulette Strategy guide for full details.

M

Martingale A betting system where the player doubles their bet after each loss and returns to the base bet after a win. Works short term but fails long term due to table limits and bankroll requirements. See our Roulette Strategy guide.

Max Win The maximum possible payout from a slot game, expressed as a multiple of the bet (e.g., 5,000x). A $1 bet on a 5,000x max-win game could theoretically return $5,000. Extreme variance games can have max wins exceeding 100,000x.

Megaways A dynamic reel mechanic licensed from Big Time Gaming. Each spin, each reel randomly displays 2–7 symbols, creating up to 117,649 ways to win on a 6-reel game. The number of ways to win changes every spin.

Multiplier A value that multiplies a win amount. A 5x multiplier on a $10 win pays $50. Multipliers can be fixed, progressive (growing with each cascade), or random. Lightning Roulette applies multipliers of 50x–500x to randomly selected numbers.

Must-Drop Jackpot A progressive jackpot that is guaranteed to be won before reaching a specific value or by a specific time. Red Tiger’s Daily Drop Jackpots must be won before the end of each day, making timing more predictable than standard progressive jackpots.

N

No KYC Know Your Customer (KYC) is the identity verification process traditional casinos use. Flush operates without KYC requirements, no passport, proof of address, or bank statement required. Account creation and withdrawals are processed without identity verification documents.

P

Payline A line across the reels along which matching symbols must land to form a win. Can be a straight horizontal line, diagonal, or zigzag pattern depending on the game. Modern slots often use ways-to-win or cluster mechanics instead of fixed paylines.

Progressive Jackpot A jackpot that grows over time as players wager on connected games. A small percentage of each bet contributes to the jackpot pool. Can grow to millions before being won. Examples: Mega Moolah, Mega Fortune.

Provably Fair A cryptographic method used in some casino games allowing players to independently verify that game outcomes were not manipulated. Uses seed hashing, the casino commits to a server seed before the bet, and the player can verify the result using their client seed.

R

Raise In poker, increasing the current bet. Forces other players to match the raise, fold, or re-raise.

Responsible Gaming Policies and tools designed to protect players from gambling-related harm. At Flush, responsible gaming tools include deposit limits, loss limits, wager limits, session time limits, cooling-off periods, and self-exclusion.

RNG (Random Number Generator) Software that generates random outcomes for slot spins, virtual card deals, and roulette spins. Certified RNGs at licensed casinos are tested by independent labs (eCOGRA, GLI, iTech Labs) to ensure genuine randomness.

RTP (Return to Player) The theoretical percentage of wagered money a game pays back to players over an infinite number of rounds. A 96% RTP game returns $96 for every $100 wagered long-term. A higher RTP means a lower house edge.

S

Scatter A symbol in slot games that triggers bonuses regardless of payline position, it only needs to appear anywhere on the reels. Typically requires 3+ scatters to trigger free spins or a bonus round.

Seed In provably fair gaming, a value used to generate game outcomes. The server seed is set by the casino and hashed before the round. The client seed is provided by the player. Both seeds combine to determine the result, which can be independently verified.

Self-Exclusion A responsible gambling tool allowing players to temporarily or permanently block themselves from their casino account. Options typically range from 24 hours to permanent. Flush offers self-exclusion in account settings.

Session A single period of gambling play from start to finish. Good bankroll management defines a session budget and stop-loss before each session begins.

Soft Hand In blackjack, a hand containing an Ace that can still count as 11 without busting. Soft 18 (Ace+7) can be hit without risk of busting, if you draw a 10, the Ace counts as 1 and the hand becomes hard 18.

Split A blackjack action where a matching pair is divided into two separate hands, each with its own bet. Always split Aces and 8s. Never split 5s or 10s.

Stablecoin A cryptocurrency pegged to a stable asset, usually the US dollar. USDT (Tether) and USDC (USD Coin) are the most common. Playing with stablecoins at Flush eliminates crypto price volatility from your bankroll calculations.

Sticky Wild A wild symbol that remains in place on the reels for subsequent spins, increasing win probability across multiple rounds. Common in free spins features.

Surrender A blackjack option allowing a player to forfeit half their bet and give up the hand before taking any action. Correct play when mathematically losing (e.g., hard 16 vs dealer 10).

T

Tumbling Reels (Cascading, Avalanche) A mechanic where winning symbols are removed from the reels after a win, and new symbols fall into the empty positions, creating opportunities for consecutive wins from a single spin. Used in Gonzo’s Quest (called Avalanche), Sweet Bonanza, and many others.

U

USDT Tether, the world’s most widely used stablecoin. Pegged approximately 1:1 to the US dollar. Available for deposits and withdrawals at Flush. Withdrawals in USDT process in under 2 minutes.

V

Variance The statistical measure of how much a game’s results deviate from the expected (RTP) average. High variance = large swings, infrequent wins, large potential payouts. Low variance = small swings, frequent wins, smaller payouts. Synonymous with volatility in casual usage.

Volatility See Variance. In casino game marketing, “high volatility” means the game pays rarely but potentially large amounts. “Low volatility” means frequent small wins. The RTP can be similar across different volatility levels.

W

Wagering The act of placing bets. In bonus contexts, “wagering requirements” refer to the number of times a bonus amount must be bet before it can be withdrawn. Example: a $100 bonus with 30x wagering requires $3,000 in total bets before the bonus converts to withdrawable cash.

Wagering Requirements A condition attached to casino bonuses specifying how many times the bonus (and sometimes deposit) must be wagered before withdrawal. Flush offers: 100%/$200 bonus at 30x, or 150%/$1,500 bonus at 35x wagering requirements.

Walking Wild A wild symbol that moves one position on the reels with each spin, creating trailing wild coverage across multiple rounds. Common in some NetEnt and Play’n GO slots.

Ways to Win A win mechanic counting any matching symbol in adjacent reels left to right regardless of vertical position. 243 ways (5 reels x 3 rows), 1024 ways (5 reels x 4 rows), or dynamic via Megaways. Replaces traditional paylines.

Wild A symbol that substitutes for any regular symbol to complete winning combinations. Does not substitute for scatter symbols. Types include standard, expanding, sticky, walking, and multiplier wilds.

Frequently Asked Questions

Q: What is the difference between RTP and house edge? They are inverse expressions of the same number. A 96% RTP game has a 4% house edge. RTP describes what the player gets back; house edge describes what the casino keeps. Both apply over millions of rounds, not a single session.

Q: What does “volatility” mean in practice? Low volatility: you’ll win frequently but for small amounts, and your balance stays relatively stable. High volatility: long dry spells interrupted by large wins. Your session experience will feel very different depending on volatility, even if the RTP is similar.

Q: What is a provably fair game? A game where the outcome can be independently verified by the player using cryptographic techniques. The casino commits to a server seed before the round, the player contributes a client seed, and both are combined to produce the result. After the round, both seeds are revealed and anyone can verify the result was not manipulated.

Q: What is the difference between a jackpot and a must-drop jackpot? A standard progressive jackpot has no cap, it grows until won, potentially reaching millions. A must-drop jackpot (like Red Tiger’s Daily Drop) is guaranteed to be won before a certain time or value, making it more predictable. Must-drop jackpots typically have smaller maximum values but are won more frequently.

Q: Does Flush require KYC verification? No. Flush is a no-KYC casino. No identity documents are required to create an account, deposit, or withdraw. Crypto withdrawals process directly to your wallet without identity verification delays.

Q: What is the difference between USDT and USDC? Both are USD-pegged stablecoins. USDT (Tether) is the most widely used globally. USDC (USD Coin) is issued by Circle and Coinbase and is often considered more transparent in terms of reserve auditing. Both are accepted at Flush with identical sub-2-minute withdrawal processing.

FAQ

What is the difference between RTP and hit rate?

RTP (Return to Player) is the theoretical percentage of all money wagered that a game returns to players over millions of rounds, for example 96% means the game retains 4% as the house edge long-term. Hit rate is the frequency with which any winning outcome occurs, expressed as a percentage of spins or hands producing a return. A game can have a 96% RTP but a 25% hit rate, meaning three quarters of spins return nothing, while the winning quarter produces larger average payouts to maintain the overall 96% return. High-volatility slots at Flush typically combine a high RTP with a low hit rate: wins are infrequent but large. Low-volatility slots combine similar RTP with a higher hit rate producing more frequent smaller wins.

What is the difference between volatility and variance in casino games?

In practice, volatility and variance are used interchangeably to describe the same property: how widely a game’s results deviate from its theoretical RTP average. High volatility means large swings in either direction, infrequent wins but potentially large payouts, and longer dry spells between significant wins. Low volatility means smaller, more frequent wins with less dramatic session swings. In the technical mathematical sense, variance is the statistical measure (the square of the standard deviation) while volatility is a qualitative descriptor of the same underlying property. Both terms appear throughout the Flush game library, and game providers classify their titles using terms like low, medium, medium-high, and high volatility in the game information panel.

What do wagering requirements actually mean for bonus players?

A wagering requirement specifies how many times a bonus amount must be bet before it converts to withdrawable funds. A $200 bonus with 30x wagering requires $6,000 in total wagers. At Flush, the two welcome tiers carry 30x (Tier 1, 100% up to $200) and 35x (Tier 2, 150% up to $1,500) requirements. Game contributions to wagering differ by category: slots typically contribute 100%, while live casino games may contribute at a lower rate, sometimes 10% to 20%. Understanding the effective playthrough cost requires multiplying the bonus amount by the wagering requirement and adjusting for the RTP of the games used: a 96% RTP slot clears wagering at a theoretical cost of 4% per wager.

What does RNG certification mean for casino games?

RNG (Random Number Generator) certification confirms that a game’s outcome generation is statistically random and cannot be predicted or manipulated. Independent testing laboratories, including eCOGRA, GLI (Gaming Laboratories International), BMM Testlabs, and iTech Labs, analyse millions of game outcomes from certified providers to verify the distribution matches the published probability model. At Flush, all 5,000 plus games from 29 certified providers carry this certification. Certification does not guarantee any player will win, it confirms the probability distribution is correct and consistent. For games where additional player-verifiable assurance is desired, Flush’s provably fair crash and dice games offer cryptographic verification that any player can perform independently.

What does provably fair mean at Flush?

Provably fair is a cryptographic verification system unique to crypto casino environments. Before each round, the casino commits to a server seed by displaying its hash (a one-way encoded value that cannot be reverse-engineered to reveal the seed). The player contributes a client seed. Both seeds are combined to produce the round outcome. After the round, the full server seed is revealed and any player can verify that hashing it produces the originally displayed hash, confirming the seed was set before the round and not modified after. At Flush, crash and dice games use full provably fair implementation. This system makes post-round manipulation mathematically impossible rather than simply audited as unlikely.

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Casino Glossary | 60+ Gambling Terms Explained | Flush