Some poker terms, many of which have become generally known in recent years:
Angle-shooter: One who shoots angles, i.e. employs certain tactics which are technically legal but probably unethical and against the spirit of the rules. For example, at the showdown, an angle-shooter might keep his (weak) hand hidden and verbally declare that he has a much stronger hand in the hopes that his opponent will fold his hand face down, thus forfeiting any right to the pot.
Bad beat: To lose despite having a strong hand, especially if your opponent gets lucky to win in spite of poor play.
Broadway: The highest possible straight: 10-J-Q-K-A.
Coffee housing: Talking to mislead or distract opponents during a hand. An accepted practice in the U.S., generally considered rude in Europe.
Dead money: In a tournament, a player who contributes to the prize pool with his entry fee, but who has virtually no chance of recouping any money because he’s a fish (see below).
EV: “Expected value,” actually a math term, referring to the weighted average of all possible outcomes of an action, hand, or tournament. Almost every serious poker player I know works this into his daily thought and speech patterns, as in: “I don’t know, if you tell your girlfriend you want to have a threesome she might actually go for it, but she’s so touchy that it’s gotta be negative EV.”
Fish: A weak player, a sucker, a donater. Everyone takes bites out of the fish. Lately being replaced by the more offensive Donkey.
Grinder: A professional who puts in a lot of hours, usually with a fairly conservative style.
The Nuts: The best possible hand.
Rabbit hunt: When a hand has ended before all possible cards have been dealt, to deal out the remaining card or cards to see what would have come.
Semi-bluff: To bluff with a weak hand that nonetheless has a good chance of improving to the best hand if called, such as a flush draw.
Stop & Go: When you are in first position, to close one round of betting by calling, with the intention of opening the following round by betting.
On tilt: Being frustrated by past results to the point that one begins to play poorly (usually too loose and/or aggressive).
Wheel: The lowest possible straight: A-2-3-4-5.