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

SFS

Short for So fucking screwed.

1. Aaaah! Im SFS!

2. Dude your SFS. lol

by Akudin January 20, 2006

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

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

SFS

The short term for the extra GCSE course of statistics, i.e Super Fun Stats. A sarcastic phrase, because statistics is the least fun thing ever known to man.

Person 1 : Oh we have SFS now.
Person 2 : Oh god I hate SFS.
Person 1 : So does every other person that has ever taken it.

by yourmother. 21334546 February 24, 2009

SFS

Stupid Female Shit - Anything that is girly, feminine and illogical, nagging, clingyness - Anything that isn't manly and down-to-earth.

Who reads those magazines anyway - they're all just a bunch of SFS

by V October 12, 2004