mathematics
Advantage
Advantage is another word for edge: being better than opponents because of skill, a stronger hand or a better position.
Ahead
Ahead means leading: having the best hand now, being up in a session, or acting before another player.
Bankroll
A bankroll is the money you set aside for playing poker.
bb/100
bb/100 is a win rate measured in big blinds won per 100 hands.
Behind
Behind means losing, or acting after another player.
Bet Odds
Bet odds compare the chance of winning to the price of continuing.
Blocker
A blocker is a card you hold that makes it harder for an opponent to have a certain hand.
Case Card
A case card is the fourth and last card of a particular rank.
Case Chips
Case chips are a player's last chips.
Coin Flip
A coin flip is a situation in which two players have roughly equal chances of winning the pot.
Combos
Combos are the possible combinations of two cards a player can hold, used to estimate an opponent's range.
Dead Card
A dead card is a card that is not legally playable.
Dead Money
Dead money is chips in the pot that came from players who have folded or who cannot win it.
Dog
Dog is short for underdog: the hand, or the player, with the lower chance of winning.
Dominated Hand
A dominated hand is a hand that is a big underdog against another specific hand, often because it shares a card with a better kicker.
Dominated Hands
Dominated hands are hands that are big underdogs against another hand, such as a lower pair against a higher pair.
Dominating Hands
A dominating hand has the same top card as another hand but a stronger second card, so it is far ahead of it.
Draw Dead
Drawing dead means drawing to a hand that cannot win even if you complete it.
Draw Live
Drawing live means drawing to a hand that would win if you completed it.
Drawing Thin
Drawing thin means chasing a draw that is still live but has a small chance to win.
Edge
An edge is an advantage you have over your opponents, from skill, experience, position or other sources.
Edge Odds
Edge odds describe a player's advantage or disadvantage relative to all other players.
Effective Stack
The effective stack is the smaller stack among the players in a hand, which is the most that can be won or lost.
Equity
Equity is a player's expected share of the pot at a given moment, based on the chance of winning.
Equity Denial
Equity denial is preventing an opponent from realizing the equity of their hand by making them fold.
Equity Realization
Equity realization is how much of its raw equity a hand actually wins, after the effect of betting and position.
Even Money
Even money is a wager made in hopes of winning the amount that was wagered.
Expectation
Expectation is the amount you expect to win or lose on average from a certain play.
Expected Value (EV)
Expected value (EV) is the average amount a play will win or lose over the long run.
Favorite
A favorite is the hand that is more likely to win a matchup.
Fold Equity
Fold equity is the extra value you get from a bet or raise because your opponent may fold. Part of your profit comes from the chance that they give up the pot, even if your hand is not the best.
Freeroll
A freeroll is a poker tournament that is free to enter but still offers real prizes. It also describes a situation in which a player can win the whole pot but cannot lose more than a split.