Mushroom Shaped Bruise 

The moment after release during oral sex a man will pop his member on the females forehead two or three times resulting in a red/purple bruise in the shape of a baby bella mushroom. Thus marking your territory as a well hung cullinary master.

After she blew me I gave her a mushroom shaped bruise and marked her for life.

Mushroom Shaped Bruise by Col. Kilgore October 9, 2011

Mushroom Stomping 

An act of mushroom stamping, but with a giant penis, usually to a person being a complete douche. This is appropriately done by slapping said douche in the face with said penis. If correct technique is applied, the stompee will have a giant, dick-shaped imprint on his face.

"Justin was being a huge dick, so Luke mushroom stomped him with HIS huge dick."

mushroom stomping

Mushroom Stomping by YouCanSuckABigOne March 7, 2012

Mushroom hammer 

When a female grabs the shaft of an erect penis, then using her other hand makes a fist and a hammer motion, smashing the head of the penis.

So jake pissed a girl off again last night, and during what he believed was his victory blowjob for winning the argument he was brought to the fetal position with a brutal mushroom hammer.

Mushroom hammer by Francis the fantastic May 20, 2014

mushroom jousting 

When two people mount onto fully erect men and have them charge at each other. Normally the first person to dismount, or if their ride softens is the looser.

Tom and Max were mushroom jousting on the beach.

mushroom jousting by shaffinhime July 14, 2017

mushroom bruise 

A phallic contusion in the shape of a mushroom inflicted by a forceful blow of a penis to one's body.

mushroom bruise by TubesteakNyourI May 16, 2003

mushroom-bruise 

A bruise, in the shape of a mushroom, obtained by being slapped with a large penis or penis-like object.

"Dude, I can't believe you goin' out with the new girl from accounting!"
"I'm gonna mushroom-bruise her ass, just for you. Just watch -- she won't be sittin' straight for a week."

mushroom-bruise by Dharma Midget September 7, 2016

mushroom dick 

as described by stormy daniels, the shape of President Donald Trump's genitals.

“I lay there," she wrote, "annoyed that I was getting fucked by a guy with Yeti pubes and a mushroom dick like the character in Mario Kart." -Stormy Daniels

mushroom dick by real610phillyhoe September 18, 2018