Casino & Card Game Glossary

Definitions for every key term in casino and card games — from house edge to pot odds, RTP to ICM. Alphabetically organised with links to full guides.

A

Ace
The highest-ranking card in most games. Worth 1 or 11 in blackjack (player chooses); 1 in Cribbage and Rummy; high in poker. → Full guide
Action
The total amount of money wagered over a session. Casinos track action for comp calculations. → Full guide
Aggregate Limit
The maximum total payout a casino will make on a single game round, often relevant in live dealer settings. → Full guide
Ante
A mandatory bet placed by all players before cards are dealt. Used in poker tournaments and Seven-Card Stud. → Full guide
All-In
Betting all remaining chips. In poker, a player can go all-in and contest a side pot limited to the chips they have. → Full guide

B

Bankroll
The total amount of money set aside specifically for gambling. Should be separate from everyday finances. → Full guide
Basic Strategy
The mathematically optimal play for every blackjack hand combination, reducing the house edge to ~0.5%. → Full guide
Banker Bet
The Baccarat bet on the banker hand winning. Has the lowest house edge (1.06%) of any standard Baccarat bet. → Full guide
Big Blind
The larger of two mandatory bets posted by players to the left of the dealer button before a poker hand. → Full guide
Blackjack
1) The card game where players try to reach 21 without busting. 2) A two-card hand of Ace + 10-value card, paying 3:2. → Full guide
Bonus
Additional funds offered by online casinos on deposits or as free play, typically with wagering requirements attached. → Full guide
Burn Card
A card discarded face-down before community cards are dealt in poker, or before dealing in blackjack. → Full guide
Bust
In blackjack, exceeding 21 — an immediate loss of the bet. → Full guide
Button
The dealer button in poker. The player on the button acts last post-flop — the most advantageous position. → Full guide

C

Call
In poker, matching the current bet amount to stay in the hand. → Full guide
Card Counting
Tracking the ratio of high to low cards remaining in a blackjack shoe to gain a mathematical edge. → Full guide
Cashback
A casino promotion returning a percentage of net losses to the player, often weekly. Generally more valuable than deposit bonuses. → Full guide
Check
In poker, declining to bet while remaining in the hand. Only possible if no bet has been made in that round. → Full guide
Chip
A token used in place of cash at casino tables. In tournaments, chips represent your tournament standing, not cash value. → Full guide
Community Cards
Shared face-up cards in the centre of the table in Texas Hold'em and Omaha poker, used by all players to make their best hand. → Full guide
Comp
Free goods or services offered to players by casinos based on wagering volume. Includes free plays, meals, hotel stays. → Full guide
Crib (Cribbage)
The bonus hand in Cribbage formed from two discards from each player. Scored by the dealer. → Full guide

D

D'Alembert System
A roulette betting system that increases bets by one unit after a loss and decreases by one unit after a win. → Full guide
Dead Card
In Seven-Card Stud, a card that has been folded face-up and is no longer in the deck. Reduces drawing odds. → Full guide
Deadwood
In Gin Rummy, unmelded cards that contribute to your point total. Lower is better. → Full guide
Deck Penetration
How deep into a blackjack shoe cards are dealt before shuffling. Higher penetration is better for card counters. → Full guide
Double Down
A blackjack move that doubles your bet in exchange for receiving exactly one more card. → Full guide
Draw
A hand that needs additional cards to become strong (e.g., a flush draw needing one more suited card). → Full guide

E

Edge Sorting
An advantage play technique exploiting imperfections in card printing to identify face-down card values. Considered cheating by casinos. → Full guide
En Prison
A French roulette rule where even-money bets are held 'in prison' for one additional spin when 0 hits. → Full guide
Even Money
A bet that pays 1:1 — you win exactly what you bet. Red/Black and High/Low in roulette; basic blackjack wins. → Full guide
Expected Value (EV)
The average amount you expect to win or lose per bet over the long run. Negative EV means expected loss; positive EV means expected gain. → Full guide

F

Fibonacci System
A roulette betting strategy using the Fibonacci sequence (1,1,2,3,5...) to determine bet sizes after losses. → Full guide
Flat Bet
Betting the same amount every round, regardless of wins or losses. Minimises short-term variance. → Full guide
Flop
The first three community cards dealt face-up in Texas Hold'em and Omaha. → Full guide
Fold
In poker, discarding your hand and forfeiting the current pot. Costs no additional chips. → Full guide
Foundation (Solitaire)
The four piles built by suit from Ace to King in Solitaire. The objective is to move all cards here. → Full guide
Free Spins
Casino bonus rounds on slot machines where spins cost nothing. Usually come with wagering requirements. → Full guide

G

Gambler's Fallacy
The false belief that past outcomes affect future independent events. Thinking red is 'due' after many blacks in roulette. → Full guide
Gin (Gin Rummy)
Going Gin means melding all 10 cards with zero deadwood. Scores a 25-point bonus and opponent cannot lay off. → Full guide
GTO (Game Theory Optimal)
A mathematically balanced poker strategy that cannot be exploited regardless of opponent actions. → Full guide

H

Hard Hand
A blackjack hand containing no Ace, or an Ace counted as 1 (e.g., hard 16 = 10+6, or 10+2+4). → Full guide
Hi-Lo Count
The most common card counting system in blackjack: +1 for low cards (2-6), -1 for high cards (10-A), 0 for middle cards. → Full guide
Hit
In blackjack, requesting another card from the dealer. → Full guide
Hole Card
A card dealt face-down. In poker, your private cards. In blackjack, the dealer's face-down card. → Full guide
House Edge
The mathematical advantage the casino holds over players, expressed as a percentage of each bet. Blackjack: 0.5%, Slots: 4-6%. → Full guide
HUD (Heads-Up Display)
Software used in online poker to display statistics about opponents based on tracked hand history. → Full guide

I

ICM (Independent Chip Model)
A model converting tournament chip counts into prize pool equity. Shows why chips have diminishing marginal value near the bubble. → Full guide
Insurance
A blackjack side bet offered when the dealer shows an Ace. Pays 2:1 but has a negative expected value for the player. → Full guide

J

James Bond Strategy
A flat-bet roulette system covering 25/37 numbers (High + Line + Zero). Costs 20 units per round. → Full guide
Jackpot
A large prize. Progressive jackpots grow with each bet until won. Fixed jackpots pay a set amount. → Full guide

K

Knock (Gin Rummy)
Ending a Gin Rummy hand when your deadwood is 10 points or fewer. Opponent may then lay off cards onto your melds. → Full guide

L

La Partage
French roulette rule returning half your stake on even-money bets when 0 hits. Reduces house edge to 1.35%. → Full guide
Live Dealer
Online casino games streamed from a real studio with human dealers, combining physical table feel with online convenience. → Full guide

M

Martingale System
A roulette betting strategy that doubles bet size after every loss, aiming to recover all losses with one win. → Full guide
Megaways
A dynamic slot reel mechanic with up to 117,649 ways to win. Each spin changes the number of symbols per reel. → Full guide
Meld
In Gin Rummy and Cribbage, a valid combination of cards: a set (same rank) or a run (consecutive same-suit cards). → Full guide
Mucking
In poker, folding your hand without showing it at showdown. → Full guide

N

Natural
1) In blackjack: a two-card 21 (Ace + 10-value), paying 3:2. 2) In baccarat: a first two-card total of 8 or 9, ending the hand immediately. → Full guide
Nuts
In poker, the best possible hand given the community cards. 'I have the nuts' means the unbeatable hand. → Full guide

O

Odds
The ratio of probability. In gambling: how likely an outcome is, and how much a bet pays relative to its probability. → Full guide
Omaha
A poker variant where players receive four hole cards and must use exactly two plus exactly three community cards. → Full guide
Outside Bets
Roulette bets covering large groups of numbers (Red/Black, High/Low, Dozens) with low but near even-money payouts. → Full guide

P

Pair
Two cards of the same rank. In blackjack, a starting hand eligible to be split. In poker, one of the basic hand rankings. → Full guide
Pegging (Cribbage)
The scoring phase in Cribbage where players alternately play cards and score points for 15s, pairs, runs, and go. → Full guide
PLO
Pot-Limit Omaha — the most popular Omaha poker variant, where the maximum bet is the current pot size. → Full guide
Position
In poker, your seat relative to the dealer button. Late position (acting last) is the most powerful. → Full guide
Pot Odds
The ratio of the current pot to the cost of calling. Used to determine whether calling a bet is mathematically profitable. → Full guide
Progressive Jackpot
A jackpot that grows with every bet placed until someone wins. Can reach millions but dramatically reduces base game RTP. → Full guide
Push
A tie in blackjack — your bet is returned with no win or loss. → Full guide

R

Raise
In poker, increasing the current bet size, forcing other players to call more, re-raise, or fold. → Full guide
Rake
The casino's fee taken from poker pots, typically 2.5-5% up to a set maximum. → Full guide
River
The fifth and final community card in Texas Hold'em and Omaha. The last betting round. → Full guide
RTP (Return to Player)
The theoretical percentage of bets returned to players over time. A 96% RTP slot returns £96 per £100 wagered long-term. → Full guide
Running Count
In card counting, the cumulative total of assigned card values seen so far in the shoe. → Full guide

S

Semi-Bluff
Betting or raising with a drawing hand that can improve. Has both fold equity and equity to win if called. → Full guide
Shoe
A device holding multiple decks of cards used in blackjack. Standard shoes contain 4, 6, or 8 decks. → Full guide
Side Bet
An optional additional bet in blackjack, baccarat, or other games. Usually has a high house edge. → Full guide
Soft Hand
A blackjack hand containing an Ace counted as 11 (e.g., Ace + 6 = soft 17). Cannot bust with one card. → Full guide
Split
In blackjack, dividing a pair into two separate hands, each requiring an additional bet. → Full guide
Stand
In blackjack, declining another card and keeping your current total. → Full guide
Stock (Solitaire)
The face-down draw pile in Solitaire that players draw from when no Tableau moves are available. → Full guide
Straight
In poker, five consecutive rank cards (e.g., 5-6-7-8-9) regardless of suit. Beats three of a kind and two pair. → Full guide
Surrender
A blackjack option to fold your hand and receive half your bet back before any cards are drawn. → Full guide

T

Tell
An unconscious behaviour that reveals information about a poker player's hand strength. → Full guide
Three of a Kind
Three cards of the same rank in poker. Known as 'trips' when using one hole card and a pair on the board. → Full guide
True Count
In card counting, the running count divided by the number of remaining decks — a more accurate measure of the advantage. → Full guide
Turn
The fourth community card in Texas Hold'em and Omaha. Follows the flop, precedes the river. → Full guide

U

Undercut (Gin Rummy)
When the non-knocking player's deadwood is equal to or lower than the knocker's. Opponent wins plus a 25-point bonus. → Full guide
Under the Gun (UTG)
The first player to act pre-flop in poker — the position directly to the left of the big blind. The hardest position. → Full guide

V

Variance
The statistical measure of how far results deviate from expected value. High variance = big swings; low variance = steady results. → Full guide
VPIP
Voluntarily Put In Pot — a poker stat measuring how often a player enters a pot pre-flop. High VPIP = loose player. → Full guide
Volatility
In slots, a measure of how frequently and in what amounts wins occur. High volatility = rare but large wins. → Full guide

W

Wagering Requirements
The number of times a bonus must be bet before withdrawing winnings. 30x on £100 bonus = must wager £3,000. → Full guide
Wild Card
In video poker and some card games, a card (often the Joker or 2) that can substitute for any other card. → Full guide