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Explosive diarrhea that is released in a shart in such a way that it sounds like machine gun artillery fire when it plops into the toilet bowl.
Stand down! Its a shartillery strike!!!

Mommy! I just had shartillery and got little bits of poo shrapnel all over the toilet bowl! Will you clean it up please?
by WorldsLargestMangina23 April 21, 2013