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2.
FCS
Short for "for christ's sake". Used in the same way as ffs., etc.
Josh: My new shoes got wet in the rain today fcs..
by Bringin88 August 26, 2009
 
1.
FCS
FCS: Friends Central School, an institution where gay catholics teach rich jews to be simple quakers. Located in Wynnewood on the Main Line of PA. About 2% of the FCS population are Christians, 5% are basketball recruits, and the rest are Jewish. To attend you must be a Democrat (Rebublicans not allowed).You must own at least 4 articles of Tiffany jewelry (boy or girl), anything burberry, and a BMW (or any car over 50,000). It is required of every student to have a drug problem, and/or go to rehab. It is also required that every teacher be gay. It is also common knowledge that the c/o 'O5 is ridiculously hot, no one can compare. If you are a student of this fine Quaker facility, feel free to add.
"my friend's prada bag was ripped at a 'take back your vagina rally', which is so FCS"
by Jizzy-Maxim October 14, 2004
 
3.
fcs
The meaning is "For Christs Sake" used mainly for internet chatting with god hating youngsters
Person 1: Why did you just say that about my mum?!?
Person 2: Have a joke with me FCS!
by MMAKS July 02, 2006
 
4.
FCs
A reference to an oppressive nintendo fanboy based website "friendcodesdotcom" That is heavily criticized for the petty attitudes of it's staff, amongst clams of racism and bigotry.
"dude the mods at FCs just banned me for disagreeing with them"

"pfft that site is soo FCs"
by Benbob June 19, 2008
 
5.
FCS
Fat Chick Syndome. The universal syndrome that seems to cause fat chicks to need constant attention, validation about everyting they do from others, and to plain and simple annoy the hell out of the rest of us. This is especially bad at the office or when drinking is involved.
'She's annoying the hell out of me AGAIN. This is unbelievable.'

'Yeah, FCS. Brutal'
by Pete April 08, 2004
 
6.
FCS
Fucking Clown Shoes
Dude, that shit is FCS!
by LOOKA MY SHOES! July 31, 2008
 
7.
fcs
Fin Control System, used on surfboards, it'sa company
fcs fin control system
by Art01art September 07, 2007