C
Call When a player chooses to match the previous bet.
Call Cold To call both a bet and raise(s).
Cap To take the last of the maximum amount of raises allowed per round of betting.
Cardroom The room or space in a casino where poker is played.
Case Chips A player's last chips.
Cash Out To leave a game and convert your chips to cash.
Check
When it's a player's turn to act and there has been no action in front of them and he opts not to bet, he "checks."
Check-Raise When a player first checks and then raises in a betting round.
Chop To return the blinds to the players who posted them and move on to the next hand if no other players call. It also means to "split the pot".
Collusion When two or more players conspire to cheat in a poker game.
Community Cards Cards that are face-up and used by all players.
Cowboys Two Kings.

D
Dead Man's Hand Two pair - Aces and Eights (Wild Bill Hickock was shot in the back while playing this hand).
Door Card This is the first exposed card, or "up" card, in a player's hand in Stud games.
Down Card Hole cards. Cards that are dealt face down.
Doyle Brunson It's a Holdem hand consisting of a 10-2 (Brunson won the world championship two years in a row on the final hand with these cards).
Draw Lowball Form of poker where each player is dealt five cards with the option of discarding one or more and replacing them with new ones and the low hand wins.
Draw Poker Form of poker where each player is dealt five cards down with the option of discarding one or more and replacing them with new ones to attempt to make a better hand.
Drop Fold.
Ducks A pair of Twos.
Deuces A pair of Twos.

E
Early Position Position on a round of betting where the player must act before most of the other players at the table. (It's considered the two positions located to the left of the Blinds.)