A sexual act in which a man strikes another human in the face with the head of his penis while in the act of urinating. Note: not to be confused with the golden mushroom the soup.
by ruff54 December 14, 2009

Northern mushroom is a direct Cantonese translation of the phrase "buck goo," literally "north mushroom," which is often used in Hong Kong and Macau to refer to prostitutes (usually referring to those coming from Mainland China as the mainland is north of Hong Kong and Macau).
by jef2k85 February 27, 2010

to forcebaly smack someone on the forehead with a penis, thuse leaving a mushroom-shaped wealt on face
by faroramzes October 29, 2003

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
that guy parked so close to me i mushroom stamped his window
by ass master January 18, 2003

by MindFuck69 November 11, 2010

When a man's pubic hair exceeds the length of his penis, leaving only a small portion of the tip visible.
I was about to have sex with this guy I met at the club, but once undressed I was disappointed at the sight of his peeking mushroom.
by Not at the table, Carlos. April 17, 2010

by alex October 22, 2004
