1. the act of getting totally wasted from drinking too much genny cream ale.

2. the resulting hangover from killing a 30 rack of genesee beer in one night.

3. the unforgivable crime of drinking all the genny selfishly, or of letting it get too warm and thus undrinkable.
Guy 1: Dude, I committed geneseide last night.

Guy 2: I know, you cleansed the fridge's beer population of any remaining genny creams.
by jack1111114 February 13, 2010

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