A combination of the words great and excellent. Usually said in a sarcastic tone. It can be muttered, hummed and sighed, all at once possibly.
Guy 1# a huge mutant ant has just done a crap on your car
Guy 2# oh grexcellent!
by RandomBiscuitJunkie January 03, 2010
A combination of great and excellent
Dude I heard it was grexcellent!
by Bearbearchu February 07, 2011

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