possible explanation for the word poker, is that it came from a version of an underworld slang word, "poke," a term used by pickpockets. Cardsharps who used the 20-card cheating game to relieve a sucker from his poke may have used that word among themselves, adding an r to make it "poker." The thought was that if the sharps used the word "poker" in front of their victims, those wise to the underworld slang would not surmise the change.