Refers to the chasis code of early models of the Mazda RX-7 (circa 1988 - 1991 in the US). The full chasis code was FC3S, but since just about all versions of the RX-7 have a "3S" ending, the first two letters are used to differentiate between this generation and the later "FD" generation (circa 1993-1995 in the US).

The FC3S RX-7 is known for it's 13B Turbo Rotary engine, especially for it's high maintenance standards and tendency to "blow" often.

The anime series Initial D features the FC3S RX-7 as the final rival car of the main character.
Ryosuke Takahasi's FC in Initial D
by boatman_x May 8, 2005
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A word used to shorten FUCKING CUNT commonly used to describe someone just being a total and utter bitch x1000
Dude Halle was being a total FC today she wouldnt even let me look
by vneck express November 23, 2010
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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
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FC - Fresh Creps
Trainers That Have Just Been Bought & Person Wants To Show It Off
Check That Guy Over There With His FC
Thinking He Looks Good, Plezz
by Nadiiaah February 17, 2009
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Fc = Centripetal Force.
Fc = (Mass x Velocity^2) / Radius
There is no such thing as a centifugal force, you stupid person!
by Urban Dictionary November 2, 2004
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Rango, las personas usualmente ponen FC al fin de su nickname para ser identificados como Traps, Trans. "FC" son siglas de la frase "Fino Culo", esto se refiere a que buscan uno o tienen uno
Pana 1: Hola, has oído del nuevo? El que tiene un FC al final
Pana 2: Si, oí que es una chica sexi uwu
Pana 1: Pero, si es hombre

Pana 2: QUE!, YA LE DI UN AÑO DE NITRO :(
Pana 1: XD
by RiceLeaf... November 11, 2020
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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 2, 2006
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