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1 definition by ssirjg238

Short for Game Killer. A similar, more masculine form of co*k-block, a GK waits until things are going well and proceeds to irreversibly destroy a friend's ability to get ass. This is usually achieved by trying so hard that it makes everyone uncomfortable.
I was making serious headway with a Bulgarian (I think) skinny blonde with a ginormous rack when GK suddenly appears in my peripheral. After thirty seconds awkward conversation and bad jokes, the blonde leaves.
by ssirjg238 April 19, 2005