Nickname for the head of the male penis which resembles just that...a mushroom head.
My boyfriend's penis is magnificent. His mushroomhead is bigger than the rest of his penis and it creates this wonderful feeling in me that leads to pure ecstasy.

penis head
by TheBigCanucklehead March 15, 2015
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A mallcore/mainstream industrial rock (not metal, you stupid faggots) band, often incorrectly stated as being the band that Slipknot ripped the mask gimmick off of. I don't really feel like delving into Mushroomhead's uninteresting history of mainstreamage, so I'll just give a bit of FYI on masks for metal bands and fake metal bands ripping them off... GWAR (real (yet admittedly a joke) metal band) started it. All these nu fucks are ripping THEM off and pointing fingers at each other. End.
Mushroomhead is as metal at Slipknot, which is as metal as a kid in Abercrombie & Fitch clothes.
by Chris Zewe September 6, 2005
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the act of imprinting your penis upon an unsuspecting girls forehead!
She leaned her head back slowly, and I proceeded to give her my mark, a mushroomhead!
by Merv Santana July 15, 2003
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One who is addicted to magic mushrooms. One who consumes magic mushrooms on a daily basis.
Syd Barret was a mushroom head before he was an acidhead and went insane.
by Assclown July 21, 2003
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(n.) A person with a forehead disproportional in size to thier jaw, thus giving th appearance that thier head is mushroom shaped. This leads people to believe that the band are fans of Quentin Tarantino.
Quentin Tarantino is quite the mushroomhead, is he not?
by Kung-Fu Jesus May 15, 2004
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Mushroomhead has to be one of the worsts band i have ever herd, and i have seen some shitty ass bands. Also to add to their shitty music the copied slipknot with with makes and shit. And slipknot like 1000 times better then mushroomhead will ever be. Mushroomhead are just posers, they couldnt thing of a gimic so they stole it from a kick ass band. Plus Corey Talyor (vocals for slipknot) is a much better singer then the singer for mushroomhead (im not even gonna look up his fucking name cuz thats how bad they suck)
slipknot is a better band then mushroomhead since mushroomhead blows it our of their ass. Mushroomhead also stole the mask idea from slipknot, SO SUCK THAT MUSHROOMHEAD FANS!!!
by #1 Maggot June 23, 2005
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