Definition of craps
noun[treated as singular]
- a gambling game played with two dice, chiefly in North America. A throw of 7 or 11 is a winning throw, 2, 3, or 12 is a losing throw; any other throw must be repeated. See also crap2.
early 19th century: perhaps from crab1 or crab's eyes, denoting the lowest throw (two ones) at dice