mushroom party 

when a group of hot horny girls get together and buy, trade, sell, and play with sex toys

naughty school girl played with a plaid vibrator that she traded her dildo for at a mushroom party.

mushroom party by School Girl July 16, 2008

Mushroom Slap

When a guy takes his hard dick, and swings it as hard as he can, hitting a person (hopefully a girl) on her body with his mushroom. If done correctly it will leave a mushroom imprint for several minutes with a lasting red spot afterwards.

(not easy to do)

ex) mushroom slap her in the face and it will leave a mark. very funny. total ownage

Mushroom Slap by Mushroom slap 696969 May 14, 2009

Mushroom eye 

The Act Of Blacking someones eye with a mushroom slap ( a solid slap of the penis to the facial region)

I gave her a mushroom eye when she didn't shut up last night.

Mushroom eye by SGH July 25, 2008

Mushroom Mathematics

The branch of mathematics that is applied when working on convoluted theories of everything and hipster sums, such as string theory and the P = NP problem, respectively. Mathematicians and Scientists who work within the field of Mushroom Mathematics employ a number of techniques, including, but not limited to: pulling Greek letters out of a hat, pin the equation on the blackboard, spin the number-wheel, and automatic writing. Typically, numerous narcotics will also be used to aid in the 'calculations'. These include magic mushrooms, LSD, and cannabis.

Proponents of Mushroom Mathematics include Stephen Hawking and Michio Kaku.

"I decided to work within the field of Mushroom Mathematics, due to my lack of proficiency in regular mathematics, particularly drawing triangles and counting."

Mushroom Mathematics by Minotawr October 12, 2011

Mushroom Stamp 

Verb: The act of pressing one's penis to a person's face, leaving a mushroom-shaped mark, with semen.

Noun: The mark left from being 'mushroom stamped'

v: Dave Mushroom Stamped Debra, after whacking off on her curtains.

n: Debra went to work today, not knowing she had a mushroom stamp on her forhead.

Mushroom Stamp by Taichi January 26, 2005

mushroom cloud 

muffin top + camel toe = mushroom cloud.

Rosie O'Donnell in a half shirt and skinny jeans?! Her mushroom cloud must be deadly.

mushroom cloud by ducttapedoc October 16, 2010

Mushroom-tip Chowder 

Jizz. or "making mushroom-tip chowder" is masturbation

Eddie: Hey! Wanna come over for some mushroom-tip chowder?

Fletch: Sure! Sounds yummy!

or

Eddie: Whatcha doin tonight?
Fletch: Nothin, just making a some mushroom-tip chowder...

Mushroom-tip Chowder by pudd thumper November 20, 2011