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Odds

The probability of making a hand vs. the probability of not making a hand.

Offsuit

Cards of a different suit.

On the Button

Being the last player to act in a betting round. Dealer’s Position.

Open-ended Straight

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

Open Card

A card that is dealt face-up.

Open Pair

A pair that has been dealt face-up.

Out Button

A disc placed in front of a player who wishes to sit out a hand(s), but remain in the game.

Outs

The number of cards left in the deck that will improve your hand.

Overpair

A pocket pair higher than any of the cards on the board.