Poker terminology - Terms with an "O"

Objective Attitude - A rational attitude based on reality.
 
Odds - The chances of getting various hands or cards.
 
Odds Against - The number of failures per success.
 
Odds For - The number of attempts per success.
 
Odds On - Odds at less than even money.
 
Off-suit - Of different suits.
 
Offensive Bet - A bet designed to build the pot.
 
Office Hours - A straight from a five to a nine, or from a four to an eight.
 
Omaha - Seven-card stud with two hole cards in one's hand and five table cards that are rolled up one at a time.
 
Omaha8 - Shorthand for Omaha high-low split.
 
On the Come - To bet before one has made a good hand.
 
On Tilt - Playing very poorly or wildly, usually after losing badly or winning big.
 
One Eyes - Picture cards with profiles showing only one eye (Jack of Hearts, Jack of Spades, and the King of Diamonds).
 
One-End or One-Way Straight - A four-card straight open only on one end, such as jack, queen, king, ace.
 
One-Eye Jacks - The jack of hearts and jack of spades as wild cards.
 
Open - The first bet of the first round.
 
Open at Both Ends or Open End - A four-card sequence that can be made a straight by two different value cards.
 
Open Blind - (1) To open without looking at one's cards. (2) A forced open.
 
Open Blind and Straddle - A forced opening bet followed by a forced raise.
 
Open Cards - Face-up cards in stud (Up Cards).
 
Open Game - A game in which anyone can play.
 
Open Pair - An exposed pair in stud.
 
Open Poker - Stud poker.
 
Open Seat - A chair available for another player.
 
Open-ended Straight - A straight draw is open-ended if it consists of four consecutive cards without the ace.
 
Opener - The player who opens the pot.
 
Openers - A hand with which the betting can be started.
 
Option - Five-card, high-low stud with a twist.
 
Option Card - (1) A card that may be either kept or exchanged (Twist). (2) A stud card that may be either kept in the hole or exposed.
 
Original Hand - The cards dealt to a player before the draw.
 
Outdraw - To make a better hand than an opponent by drawing better cards.
 
Outrun - See Outdraw.
 
Outs - A poor hand that can win on the draw.
 
Over Button - Players can take \over\" buttons that mean they're willing to play for higher limits. "
 
Overcall - The calling of a big bet after others have called.
 
Overcard - A card that is higher than any card showing.
 
Overcards - Cards that rank higher than a pair.
 
Overhand Shuffle - A shuffle made by sliding cards from the top of the deck into the other hand.
 
Overhand Stack - An overhand shuffling technique for stacking cards.