A condition similar to Coprolalia (the condition which causes one to shout obscenities involuntarily, often confused with Tourette's syndrome) brought on temporarily by making mistakes while playing Tetris.
Anna: Piss! Shit! Ass!
Dave: What's wrong with Anna? Does she have coprolalia?
Grace: No, she's just playing tetris.
Dave: Ah, another tragic case of Tetrette's.