Term: crap shooting: playing craps
Broader: craps: 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 | Unrelated: noblesse oblige: the obligation of those of high rank to be honorable and generous (often used ironically)