Poker declaration is a term used to describe the various verbal declarations that can be made during a game of poker. The most common declarations are 'OPEN' (4 letters), which is when a player initiates a betting round, 'CALL' (4 letters), which is when a player matches the current bet, 'I'm in' (4 letters), which is when a player calls a bet after not having previously called, 'I CALL' (5 letters), which is when a player calls a bet after having previously called, 'I fold' (5 letters), which is when a player chooses to discard their hand and forfeit the pot, 'I'm out' (5 letters), which is when a player folds after having previously called, and 'I pass' (5 letters), which is when a player chooses to not CALL a bet. Finally, 'I raise' (6 letters) is when a player increases the current bet.