a guy who goes absolutely crazy when he plays football/sports;insane in the membrane.
Dude, Bob went cosmo on me after I hit him and then he KICKED...MY...ASS.
by Ann glasglow January 2, 2006
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Cosmos describes one of the hottest guys on earth. Their sweet and funny, with a slightly cool (but not "I'm all that)" vibe to them. They laugh easily and are playful! He's one of the best friends you can get! No matter what, you know you can count on him.
1. I went through such a hard time this year. It really showed me who my real friends are. My best friend was such a Cosmos.

2. Cosmos is the best.
by Shell Shell! February 10, 2011
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short for cosmotologist, mainly used for high end hair stylists or at high end beauty schools to describe the students "cosmos".
by Cosmo Girl, Holla. July 9, 2005
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One universally cool and trendy chick who knows about everyone and everything, she's really well liked and just hell cool in general

Probably from the word cosmopolitan/cosmos
by Sad loner boy March 10, 2019
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Cosme G. Martinez from S.H.S. in garden grove,ca
by tony February 8, 2005
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Tails' girlfriend on sonic X. they start to develop feelings toward each other during the course of season 3. She comes to warn Sonic & friends about the metarex, a group of alien robots that steal planet life. In the end she transforms herself into a tree and envelops herself around the metarex planet to immobilize and stop them from destroying the galaxy. This gave tails the opportunity to destroy the metarex for good with his sonic cannon but at a price: cosmo's life. The fact that Tails had to kill the one he loved makes many fans consider it the saddest anime moment in history.
(shot destroys the metarex and cosmo)
Tails: COSMOOOOOO!!!!!!!!!!!!!
Cosmo: tails whenever you miss me just look for me right beside you.
(cosmo's spirit kisses tails then immidiately dissapears into the afterlife)
RIP Cosmo the Seedarian
by Majin Tails October 21, 2009
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