mushroom-fetius 

An insult in which the mushroom-fetius-E has a baby mushroom in their brain from either too much shrooms or being a hater on via: facebook; twitter; myspace; etc. Against family or friends.

Example: john was telling sally about his trip to his families house and how stupid he thought his cousin was being. And in reply sally said, "your being a total Mushroom-fetius"

john:" i was like all 'dude you don't have to shove all that in your face. Gosh he is so stupid..."
sally: " john, everybody is dumb in a way, but your being a total mushroom-fetius."

mushroom-fetius by yamazaimoku sisters July 4, 2011

mushroom dogbone 

Codename for penis. The mushroom is the tip and the dog bone is the shaft and balls.

Jimmy was drawing a mushroom dogbone on his mushroom dogbone this morning.

mushroom dogbone by Adhesive Elephant Tenders October 8, 2013

Mushroomhead 

Most usually the overly large size of a glans of a penis relative to its shaft.

Usually a mushroomhead will require circumcision of the penis to allow painfree erections around puberty.

Dave loved the attention his mushroomhead gained him at the nude beach.

Andy and Luke spent hours studying Bob's mushroomhead.

Jackie found Sam's mushroomhead almost too much for one girl's capacity, but it was so worth it!

Mushroomhead by Townsman December 30, 2014

mushroom 

A mushroom is guy who is unattractive overall without any redemptive qualities (such as good personality, charisma, sense of humor, smells good). They are just full of cringeworthy qualities such as:
Being painfully ugly
Lacking hygiene
Messy appearance
Typically shy
Arrogrant

If there is something good about him that makes him tolerable, then he is probably not a mushroom.

The female equivalent is a moth.

"God, I hate Charlie. He's ugly, almost obese, rude, and smells really bad."

"Golly Jennifer, why are you even friends with that mushroom? All he does is play video games and avoid daylight. "

mushroom by misterxoxo January 25, 2016

Artificial Mushroom Stamp 

When you smack someone across the face with a dildo.

guy 1- dude why are you holding a dildo???
guy 2- to smack you in the face.
Random hobo- ARTIFICIAL MUSHROOM STAMP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Artificial Mushroom Stamp by Venix13 January 11, 2010

rusty mushroom 

upon finishing anal sex when the male pulls out and has poop residue on his mushroom stick

Friend 1: Did you have fun with Heather last night?

Friend 2: Yea we had dinner and screwed and she let me put it in her backdoor but when we finished I had to go clean off ASAP because she left me with a rusty mushroom.

rusty mushroom by SunDiablo September 6, 2013

Penile Mushroom

Mushroom givin to one's face, made by a male, slapping his penis on someone else's body, and leaving a mark in the shape of a mushroom.

Mother: Ashley L. A.!! What is that on your face!?
Ashley: John gave me a Penile Mushroom, Mom. I was going to sleep with him, but he slapped me with his dick, so I don't want to anymore.

Mother: Well now at least you might not be as much of a whore.

Ashley: Mom!!! >:(

Penile Mushroom by GanGanGirl April 11, 2014