All 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Word Description
Odds The probability of making a hand vs. the probability of not making a hand.

Odds Against The number of failures per success.

Odds On Odds at less than even money.

Offsuit A hold'em starting hand with two cards of different suits.

Omaha A game in which each player is dealt four down cards with five community cards. To make your hand, you must play two cards from your hand and three from the board.
On Tilt Playing worse (usually, more aggressively) than usual because a player has become emotionally upset.

One-Gap A hold'em starting hand with two cards two apart in rank. Examples: J9s, 64.

OOP Out Of Position

Open To make the first bet.

Open-ended Straight Four consecutive cards whereby one additional (consecutive) card is needed at either end to make a straight.

Out A card that will make your hand win. Normally heard in the plural. Example: "Any spade will make my flush, so I have nine outs."

Outdraw When one person beats his or her opponent by drawing a better hand.

Overcall To call a bet after one or more others players have already called.

Overcard A card higher than any card on the board. For instance, if you have AQ and the flop comes J-7-3, you don't have a pair, but you have two overcards.

Overpair A pocket pair higher than any card on the flop. If you have QQ and the flop comes J-8-3, you have an overpair.