"Sexually Frustrated"
When you havent had sex in a very long time!
Girl:OMG!!my boyfriend has been away for like 4 months and ive been so SF its not even funny -_-

Guy: Damn bro, i havent seen my girl in 3 days im fkn SF!!!
by creatorofsf September 1, 2011
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An abbreviation used to describe having skateboard/snowboard fantasy syndrome. Fantasizing about a trick you want to do but can’t
Oh man I’m having some mad sfs at that 12 stair over there “
by YayeetV2 May 10, 2018
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SFS is an abbreviation for ‘shoutout for shoutout’ mostly seen on Instagram stories. ‘Shoutout for shoutout’ means to advertise other people’s accounts and in return they’ll do the same.
Friend 1: sfs?
Friend 2: sure
Both: post each others @ on their stories
by Willyman555 July 17, 2019
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Same Fuckin' Shit; A reaction to someone when two things he/she mentions are undeniably and objectively similar or identical.
John: Hey Frank, can you pass the Booze?

Frank: You mean alcohol...

John: SFS
by Albertross99 January 4, 2011
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SFS is short for Somalian Forehead Syndrome. A fake syndrome describing people who suffer from disproportional sized foreheads common with people of Somalian descent. Used in conservation as an insult.
Person 1: You've got SFS.
Person 2: Fuck you!

"Hey, take a look over there, that guy is suffering from a massive case of SFS."
by Some other other guy April 16, 2008
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An abbreviation for School Friend. Similar to fake friend. Someone that only wants to be friends at school
Don’t worry about him, he’s only a sf anyway.
by SangerBanger March 5, 2018
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1) Symbol For Sex

2) A sex symbol
Guy 1: Damn Sally is so fine she a sfs

Guy 2: A what?

Guy 1: A symbol for sex
by thenumber1word November 6, 2017
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