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 male act of stamping the penis into an ink blotter, then proceeding to mark an unsuspecting customer with the "branding" of the mushroom tip.
"Yesterday Sam got ahold of mom's red ink blotter and I woke up to him mushroom stamping me in the face".
by LinzMarie79 July 5, 2010
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Getting hit with the shaft of a male leaving an impression on ones forehead.
Shane Graves enjoys mushroom stamping Joey Morrow.
by PArtsBoyLOversXoXoXoXo May 30, 2012
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When a a dude and chick have anal sex and when the guy pulls out, poop is on his dick and he slaps the girl on the cheek with his dick removing all of the poop on his dick and leaving it on her face in the shape of a mushroom.
Jamie: "Dude, David's mushroom stamps hurt!! He hits you so hard with his cock!"

Vanessa: "I like to take a Mushroom Stamp on the tounge."
by Dyaln (triip) Herzberg January 10, 2009
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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 8, 2003
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This is when a guy hits a girl in the forehead with the tip of his penis.

Specifically, the bottom part of a circumcised penis looks like a mushroom head, so the male would tap the bottom tip of his dick on her forehead with his mushroom and thus stamping her forehead.

Typically performed on females that you feel are sluts to make them feel like a complete slut.
i hooked up with this slut so I mushroom stamped her, just to be an ass.
by john_doe_123 February 3, 2010
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