1 definition by Scubaman

Top Definition
An official unit of measure of how fat or skinny a chicks ass is.
measurement is accomplished by holding ones hands out in front palm side down and touching thumbs to each other and folding index, middle and ring fingers down. The remaining space is considered a GENE.

Dude, i hooked up last night and she was a gene. Or dude i hooked up and she was 2 genes (fat)
by Scubaman December 11, 2012
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