The Collaborative International Dictionary of English v.0.48:

Crap \Crap\ (kr[a^]p), n.
   1. In the game of craps, a first throw of the dice in which
      the total is two, three, or twelve, in which case the
      caster loses. Also called craps.
      [Webster 1913 Suppl. +PJC]

   2. same as excrement and feces. [vulgar]

   Syn: shit. [PJC]

   3. nonsense; balderdash; bullshit; -- also used as an
      expletive. [vulgar]

   Syn: bullshit. [PJC]

The Collaborative International Dictionary of English v.0.48:

Craps \Craps\ (kr[a^]ps), n.
   A gambling game with dice. It is one of the more popular
   games in casinos. [Local, U.S.]
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

craps
    n 1: expressions used when when two dice are thrown and both
         come up showing one spot [syn: craps, snake eyes]
    2: a gambling game played with two dice; a first throw of 7 or
       11 wins and a first throw of 2, 3, or 12 loses and a first
       throw of any other number must be repeated to win before a 7
       is thrown, which loses the bet and the dice

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "craps":
   bingo, bird cage, bones, card games, cast, chuck and toss,
   chuck farthing, chuck-a-luck, crack-loo, crap, crap game,
   crap shooting, crooked dice, cubes, deuce, dice, die, doubleton,
   fan-tan, hazard, horse racing, ivories, keno, loaded dice, lotto,
   natural, nick, pair, pinball, pitch and toss, poker dice, policy,
   roll, rouge et noir, roulette, shell game, shot, snake eyes,
   sweepstake, sweepstakes, teeth, the numbers, the numbers game,
   throw, trente-et-quarante