What does "crap out" mean?

Back down, quit, When it got to the point of putting up some money, Jack crapped out. This expression originated in the game of craps, where it means to make a first throw (of the dice) of two, three, or twelve, thereby losing. [Slang; 1920s]
Go to sleep. This usage was military slang for sleeping during work hours or during a crap game. [Slang; c. 1940]
Die, as in He's really sick; he could crap out any time. This usage is less common than def. 1 or def. 2. [Slang; 1920s]

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