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1.
the acronym for "Guffawing in my chair". used commonly among older internet users in place of "rofl" or "lmao".
Via Facebook:
Guy 1:hey! i was at that party!
Guy 2: i no! u were so wasted xD
Guy 1: at least i was gettin at that one chick!
Mom: y is my daughter in this picture?
Guy 1: uh... >.>
Guy 2: GIMC!!! UR SO DEAD!!!!
by JEYEBROWS16 August 16, 2010