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1 definition by Johnny Knock-Knock

Noun; The act of slapping a person across the head or chest with a piece of poop that is halfway out of the performer's anal cavity.
After giving his wife a boston steamer, he gave her an italian mudflap on top of it.

John got an italian mudflap from his college buddies while he was passed out.
by Johnny Knock-Knock May 05, 2010