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A noun used to describe sexual intercourse - is usually used by someone who has an obsession with sharks or sea creatures.

Can be used interchangeably with the word ass.
Kyle: I was gettin' some fin last night - it was hot!

Morality Preacher: Whoa, whoa little pup - you're not even a shark yet. You should wait a few years before tappin' that fin ;)

Kyle: Yay Morals!
by TheShark06 October 28, 2006
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the opposite of "deck"... very uncool... if you are deck... you have a serious case of the uncool gene
"you're so fin!"
by the dudette October 28, 2003
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Yo Jay, this is only a .3! What the fuck! I paid for a fin!
by Melvin_flynt_da hustla November 13, 2003
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A: Hey man, wanna get a shot of Twelve Sky 2?
B: Nah, I dont like that fin boring game, man.
by 1ekoks June 12, 2010
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Noun. People and Mer-Folk who are Fans of the Artist/Mermaid Meridian Mer-Gyver from In The Eyes of March.
"Welcome All my Fins!!!"

"To all my Fins, I couldn't have done it without you!"
by Meridian Mer-Gyver February 25, 2013
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What to say in place of "five" to avoid having to slam your entire beer.
Player 1: "What's Cotroneo's badge number?"
Player 2: "Fineightyfive."
Everyone in room: "OOOOOOOOOOOOOOOOOH!"
Player 2: "SHIT!"
Player 1: "Slam it!"
by Rigga May 10, 2005
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FUNNY IN the MOMEMT. An event in which it was very funny but not as funny as it was in the actual moment.
Valerie: Remember that one time when you fell?
Jennfier: yeah....that was f.i.n
by peanutjane April 12, 2011
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