The praise and dedication to mushrooms, be it real mushrooms or magic ones from Mario.

Practices of Mushroomism require life dedication to The Almighty Covan of Mushroomity, consuming extortionate amounts of multiple mushroom types, or just simply extreme procrastination playing any form of Mario game.
by DarkCandyDragon13 June 27, 2014
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When you pull your scrotum over your penis forming a mushroom like shape where your genetiles should be.

Sam, your mushroom is huge!!
by Sam Wampler October 23, 2007
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A Mushroom is when you dip your cock in paint or ink, And slap someone in the face with it when they are passed out. Thus leaving a mushroom imprint on their face.
"At this party last night, Kim was the first to pass out, So I gave her a mushroom"
by CharlesVA August 5, 2006
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Things that make you feel funny, and prolong orgasms
It kept coming and coming, must be the mushrooms.
by Spelunking Monkey February 10, 2003
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something that always comes after a badger.
Badger! Badger! Badger! Badger! Badger! Badger!
Mushroom! Mushroom!
by mushroommushroom April 24, 2007
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