Top Definition
The act in which a man engaging in anal sex with a woman while wearing a condom pulls out, takes off the condom, and proceeds to whip it around wildly similar to a lasso, often speckling the surrounding area with feces. May end with the woman being smacked in the face with said condom.
"I gave my girlfriend a muddy helicopter. I've never seen a brown mushroom stamp before."
by guesswho76 February 03, 2010

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