Mushroom Stampede 

The act of being continuosly mushroom stamped to the facial area with less than 2 second intervals between stamping.

Taylor, Savannah's face looks like shit from that mushroom stampede last night.

Mushroom Stampede by Turdnuggetbluntman February 9, 2010

mushroom stamping 

The act of pressing the head of ones penis into another persons forehead or other facial area.

As soon as Ben passed out, Jer proceeded to mushroom stamp him to no avail.

mushroom stamping by Snapdragon August 8, 2003

mushroom stamped 

Pressing ones penis on the forehead of an unfortunate individual.

Greg fell asleep and was mushroom stamped.

mushroom stamped by n/a March 30, 2005

mushroom stamp 

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

mushroom stamp by ass master January 18, 2003

mushroom stamp 

when you hit someone with your penis and leave a mushroom shaped mark

That girl got mushroom stamped!

mushroom stamp by Dakota w. June 26, 2008

Mushroom Stamp 

To slap a female in the forehead with intent to leave a mark with your cock

The bitch was pissing me off, so i Mushroom Stamped her.

Mushroom Stamp by Lady Tiger January 7, 2003

mushroom stamp 

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

mushroom stamp by Tony Cooper August 31, 2004