Top Definition
In beer pong or similar drinking games, the fuck-up cup is one cup which has substantially more beer than all the others. This often causes the partner of the pourer to argue that they don't have to drink it when that cup is taken during the game.
You're the one who filled it wrong Jay, I'm not drinking the fuck-up cup!
by Brian F- September 18, 2006
5 Words related to Fuck-up cup

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