A person with absolutely no personality who soaks up personality from other people, especially people they are dating. This would include interests, sense of humor, fashion sense, etc.
The best celebrity example of a mushroom is Brad Pitt. You may notice that he changes the way he dresses and his interests based on who he's dating.

Used in a sentence: James claimed he like strong personalities, but his current girlfriend is evidence that he likes mushrooms.
by Serendipity99 July 5, 2007
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a poisonous fungi grown mostly in shit or on damp logs, that makes you get in touch with your holographic spirit, oh and you trip. the trip lasts for 4 to 8 hours. try some dutch shrooms. goddamn.
by lefty September 16, 2003
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An individual who is closely tied with their origins. So connected to their roots, they stubbornly refuse to live outside of their surroundings. Despite opportunities in other lands, the individual will not migrate. ,affection, lover, immigration, urban, artist
The artist will not blossom abroad, simply because he is a mushroom.
by Ola Plum March 31, 2008
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Mushrooms;a fungi. You would think that wouldnt be very exciting. It is. You smile from ear to ear and laugh like you heard the funniest thing ever. Your puples get huge but whatever. Not a good drug to take in front of parents. Good music to listen to would be Mushroomhead. Or possiably the postal service. Anything that makes you appriciate your life.
One night while with twelve of my closest friends me and one of them bought two oz of mushrooms. Needless to say everyone tripped there balls off. We thought we were in the amazon.
by kcarbby July 14, 2008
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you ex-boyfriend or ex-girlfriend, or whoever really likes you and you lay down the law and will not let you go. they are a fungus like, as in gross, and are stuck on you for what feels like forever. they seem to not want to move on at all, when you are already over them.
1. This boy kyle is a mushroom! he will not move on!
2. My ex-girlfriend is being such a mushroom, man.
by Abbay June 14, 2007
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A way to masturbate where you hold the shaft and rub the tip of your penis in a circular motion.
The mushroom is one of the best ways to masturbate.
by hqwfhf May 24, 2008
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