Real Dictionary

craps in American English
a gambling game played with two dice: a first throw of seven or eleven wins, and a first throw of two, three, or twelve loses, while any other first throw, to win, must be repeated before a seven is thrown
noun: a game in which two dice are thrown and in which a first throw of 7 or 11 wins, a first throw of 2, 3, or 12 loses, and a first throw of 4, 5, 6, 8, 9, or 10 can be won only by throwing the same number again before throwing a 7

craps in British English
a gambling game using two dice, in which a player wins the bet if 7 or 11 is thrown first, and loses if 2, 3, or 12 is thrown