SF

Special Forces. Used in the military and miltary wannabes.

rick: Dude i wanna be SF when i enlist.
Dude: You're hardcore.

by kilo15 December 28, 2005

SF

SF means Saturated Fat

it can be woman or man, usually fat ugly and full of themselves...literally.
please see third paragraph down on "c dub" for further clarification

yo did you see SF today? she ate my Doritos and drank all the beer and now shes all over my boyfriend!

by ahhhhhhhhhhhhhhhhhhhaha April 5, 2010

SF

Science fiction

Girl: I saw a review, but I don't like SF
Boy: I love SF. Most of it. I hate Star Trek.....

by Soyrua January 2, 2010

sF

noun. to be weak, gay, newb.
a d2 clan known for using AA in clan duels to win, as that is ther eonly hope, also known to pray to god for help when dueling good clans.

that clan uses AA and duels like a bunch of sF newbs.

by sF-Holo July 27, 2004

sF

Stupid fuck

Man A: fu sf
Man B: well fu

by Blom September 3, 2003

sfs

Abbreiviation: Shit/Fart Seperator. Located in ones ass to alow one to fart without shitting in ones pants.

Oh no! My sfs malfuntioned! I thought I was gonna fart but I sharted!

by Wiz Bang July 26, 2007

SF

shit faced, not san francisco.

That girl was SF. But she was not san francisco.

by DA September 2, 2003