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The act wherein one defecates on one's face and then goes to school. Origin: Steve Mucci, inventor and executor of the first Mucci. Can only be done to oneself!
Dude, if you don't cut that shit out, I'll make you give yourself a Mucci.

Did you hear about Fat Tina? She gave herself a Mucci after Ted broke up with her, she was so upset.
by Giuseppi Mucci August 30, 2004