Bluff (To),

in the game called Poker, is to stake on a bad hand. This is a dodge resorted to by players to lead an adversary to throw up his cards and forfeit his stake rather than risk them against the “bluffer.”

“The game proceeded, George, although he affected no ignorance of the ordinary principles of poker, played like a novice—that is to say, he bluffed extravagantly on absurdly low hands.”—Truth: Queer Stories, Sept. 3rd, 1885