Back Door:
Used in Texas Hold'em poker to describe a hand made using both the turn and river cards
Bet:
The act of placing a wager in turn into the pot on any betting round
Big Blind:
The largest regular blind in a game
Blind:
A required bet made before any cards are dealt. It is called Blind because you are betting without seeing your cards, thus you are betting blind
Bluff:
To bet or raise with the worst hand in hopes that the remaining players will fold
Board:
All the community cards on the table
Boardcard:
Any community card on the table
Broken Game:
A game no longer in action
Button:
A player who is in the designated dealer position
Buy-In:
The amount of money brought in when entering a game