Short for Sexual Frustration Syndrome; the state of being sexually aroused and/or frustrated. The need for sexual healing to alleviate chagrin.
Dude, I've got major SFS, I need to get some pootang.
by Schmooie January 26, 2007
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So Fucking Stressed

When you are stressed out beyond belief and you just can't take it anymore.
Bob: Finals are tomorrow bruh
Fred: Oh Shit I'm SFS!
Bob: I know I haven't even started studying yet nikkuh
Fred: It's too much to handle I give up
by Johhny Chocolate January 18, 2011
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San Francisco
One of the most beautiful cities in the US and amazing for it has a soul.
I left my heart in SF...
by lois77 June 1, 2005
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SF: Stupidty Factor
Acronym adjective for the description of the mental density of people (or distinct lack thereof), possibly in a covert manner to your co-workers/friends
1. There is a high high SF fault in this room.
2. The SF is so thick you can taste it.
by T. Walsh / Ronan XVII January 4, 2005
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Acronym for Standard Fantasy Setting. You got your elves, dwarves, goblins, swords, and magic. If you can't talk about it without referencing the Lord of the Rings or Dungeons & Dragons, it's probably in the SFS.
"I'm making a game about dwarves, but it's not in the SFS cause they're like actual dwarves who work as tax accountants."
by TeenageAngst July 3, 2013
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