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When one, in the heat of passion, poops in a girl's (or guy's) mouth, then performs an uppercut on the receiver's chin causing the feces to scatter all over the place of business.
"Dude, I took a dump in this girl's mouth, then uppercut her chin and my poo went EVERYWHERE! It was the nastiest Frowny Brownie ever!"
by Man Council (MC or CALF) August 14, 2008
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