beginner
Odds On
Odds on describes a situation in which an event is more likely to happen than not. A favorite is said to be odds on.
Offsuit (o)
Offsuit means that two cards are of different suits. In Hold'em, an offsuit starting hand has hole cards of different suits, and is a little weaker than the same hand suited. In notation, it is written with an 'o', such as AKo.
Omaha
Omaha is a poker game similar to Hold'em in which each player gets four hole cards and must use exactly two of them with exactly three of the five community cards. The most popular forms are pot-limit Omaha and Omaha hi-lo.
On the Button
On the button means being in the dealer position, the player who acts last after the flop. The button marks this seat and moves clockwise after each hand.
On Tilt
On tilt describes a player whose emotions harm his play, often after a bad beat or a series of losses. He plays worse than usual, often with too much aggression.
One Time
'One time' is a plea that players say aloud when they need a specific card to come, as in 'one time!' on the river. It is a way of asking for luck, rather than a play or a rule.
One‑Chip Rule
The one-chip rule says that a player who puts a single chip in the pot, when facing a bet, is making a call and not a raise, unless he says 'raise' first. It applies even if the chip is of a higher value than the call.
One‑End
One-end, or one-way straight, is a four-card straight that is open only at one end, such as jack, queen, king, ace.
One‑Gap (One‑Gapper)
A one-gap hand, or one-gapper, is a starting hand whose two cards are two ranks apart, with one rank missing between them, such as J-9 or 6-4. It can make a straight only in a few ways.
One‑Way Straight
A one-way straight, or one-end straight draw, is a four-card straight draw that can be completed on only one end, such as jack, queen, king, ace. It has only four outs.
Open
To open is to be the first player to bet in a betting round. Before the flop it means to be the first to raise. An open raise is the first raise in the pot.
Open at Both Ends
Open at both ends means a four-card sequence that can become a straight with two different cards, one at each end. It is also called an open-ended draw.
Open Card
An open card is a card dealt face up. In stud and some other games, open cards are seen by all players.
Open End
An open end is a four-card sequence that can be made into a straight by two different cards. It is also called open at both ends or an open-ended draw.
Open Game
An open game is a game in which anyone can play. It is not restricted to a private group.
Open Limp
An open limp is entering the pot before the flop by only calling the big blind when nobody else has entered. You are the first player in, and you do not raise.
Open Pair
An open pair is a pair that has been dealt face up, so all players can see it. It is common in stud games.
Open Poker
Open poker means poker games in which some of the cards are dealt face up, such as seven-card stud. It is the opposite of closed poker, in which all cards are hidden.
Open Seat
An open seat is a seat at a poker table that is unoccupied and available for a new player to join the game.
Open‑Ended Straight Draw
An open-ended straight draw is four cards in a row that need one specific card at either end to complete a straight. It has eight outs, so it comes in about one time in three by the river.
Opener Button
An opener button is a button used to show who opened the pot in a draw game. It marks the player who made the first bet.
Openers
Openers are the cards that a player holds to qualify to open the pot in a game such as jacks or better. For example, if you have a pair of kings to open, the kings are your openers.
Option
The option is the right of the big blind, or a straddler, to check or raise when nobody has raised before the action returns to him. It is the last chance to act before the flop.
Orbit
An orbit is one full rotation of the dealer button around the table. In a nine-handed game, an orbit is nine hands.
OTB
OTB is short for 'on the button'. It is used in hand histories and discussions to describe the player in the button seat.
Out
An out is a card that will improve your hand to one that is likely to win. For example, with four cards to a flush, there are nine outs: the nine remaining cards of that suit.
Out Button
An out button is a disc placed in front of a player who wants to sit out a hand or several hands but keep his seat in the game. It shows that he is away.
Out of Position (OOP)
Out of position, OOP, means acting before your opponent on each street after the flop. It is a disadvantage, since he sees your action before he acts.
Outdraw
To outdraw is to beat an opponent by drawing a better hand. The player who was behind catches a card and wins.
Outs
Outs are the unseen cards that will improve a player's hand to one that is likely to win. For example, with four hearts, there are nine outs for a flush.
Overcard
An overcard is a card that is higher than any card on the board or in the other hand. In Hold'em, your hole cards are overcards when they are both higher than the board.
Overpair
An overpair is a pocket pair that is higher than any card on the board. For example, a pair of kings on a flop of 9-5-2 is an overpair.