GC is an abbreviation for "Green Crack" an extremely potent hybrid strain of Marijuana.
Yo, I picked up a quarter of that GC off of Ben! It's going to be a great weekend!
by JaymzKB May 05, 2010
Giant Condom.
GC anyone?
by imz97 October 29, 2011
grade conscious
He keeps on listing the grades of his classmates also running for honors. He's so GC.
by iammmyself September 09, 2010
An old long forgotten chat board on www.Neopets.com. Filled with teenagers whom seemed to be on 24/7. Infested with n00bs and almost entirley spam, the place was deleted by the evil TNT a few years back, and now is the stuff of legend, with rumours spread by the old GCers.
Old GCER: "Hey does anyone remember on GC when everyone used too.."

n00b: "WOW * spreads to everyone*
by thecheescakeofdoom December 05, 2010
Stands for "Groupie-Confessions"
Being subject to the confessions of a groupie you had sex with.
Eric: Yo Gabe you trynna hit dis chick?
Gabe: Naw bro, I ain't trynna be on no "GC" tapes!
Eric: ... True!
by SMUSHiE PARKER March 29, 2010
Acronym for gay cunt, commonly used as an insult. Other insults in the 'cunt' family include dumb cunt (DC), sick cunt or shit cunt (SC), mad cunt (MC).
That guy's such a GC.
by DTraj June 13, 2007
Abbreviation of glasscock.
GC! You fail!!!
by Guinness2702 April 20, 2009

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