slapping a penis on top of someones forehead or on a car window
we gotta get out of here i just mushroom stamped that cops car

that guy parked so close to me i mushroom stamped his window
by ass master January 18, 2003
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Verb: An act occurring after anal intercourse, where the man removes his "Mushroom"-headed warrior from his female participant's rectum or balloon knot, and proceeds to take his poo-stained man-pole, and slaps his partner in the face or forehead (whatever preferred), leaving a mark (or stamp) in the shape of the tip of the distributor's dong (mushroom-esque);
When I was finished penetrating her poop shoot, I used her rectal leftovers to give her a Mushrrom Stamp
by Tony Cooper August 31, 2004
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When a man slaps a woman on some part of her body with his member.
'Slap'
Her "what are you doing?"
Him "Giving you a mushroom stamp, bitch!"
by mushroom stamper October 10, 2007
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The stamp usualy worn by hookers after a rough night.
Ohhhhh girl, I gotta wash this mushroom stamp off my cheek. But I made fity bucks.
by {E-Z}Ryda February 08, 2003
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