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21.
fs
FS are the tags for a popular online clan of the MMORPG game Runescape. It is owned by P0ke N Die2 and has proven to be one of the strongest pure clans alive. The website is www.fearless.ipbfree.com
Omg dude did you see FS poon IR last night? I mean I haven't seen pooning like that since world war 2!
by youllneverfindout December 31, 2007
 
1.
fs
Full Service - conventional sexual intercourse
by swinger September 19, 2003
 
2.
F-S
To fireswipe, this means when you enter the subway illegally by either jumping the turnstile or using a broken turnstile.
Are there any PHOENIX around? I think we should F-S vin.
by Shazaamizer June 25, 2006
 
3.
fs
Fucks Sake. Colloqiual (usually Eastern Scottish) internet acronym. Almost identical to ffs but lazier.
fs, those bastards at amazon havent shipped my album yet.
by wadie May 15, 2003
 
4.
FS
Short for "full screen", as opposed to WS for "wide screen".
by RotJ October 04, 2005
 
5.
fs
Short for "Fat Slut" - girls who are obese and still wear tight, revealing clothes in attempts to get sweet hooks.

From the same semantic field as "ys" (young slut).
"Far out why are all parties nowadays filled with fs."
by Drylinerrr October 30, 2011
 
6.
FS
this means "For Sale." People usually use this word on forum sites especially on car forums, but it can be used on any kind of sites where you can sell and buy.

using this word in a thread or forum where you post pictures and description about what you are selling.
For Sale: Front Bumper Lip for 250 shipped.

or

FS: Front Bumper Lip for 250shipped.
by ilovehonda November 15, 2007
 
7.
fs
Acronym for Fucking Shit
WTFS? I stepped on a piece of bitch shit!!!!!111
by benhpark December 14, 2007