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A male rubbing ones own grundle with another males grundle, behavior closely associated with two males giving up sexual realations with women to play " word of Warcraft " or " Aion "
Matt and Greg are the biggest grundlebumpers in the world!!! They would rather play Aion then go out and get laid
by Imperial18 October 01, 2009

Words related to Grundlebumpers

grun grundle grundlebump grundlehumper grundles