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1.
A term that is used for the bulge above a mans penis. It is where the gut meets the penis and is somewhat undefined and gross. It is the male version of a "gunt".
Wow, Ray has quite a sweaty geenis on him, doesn't he?

by Tom420 November 01, 2005
 
2.
When a mans gut is so big it folds over and touches his Penis.
Dave kept hitting himself in the nuts with his Geenis
by Dilldo October 18, 2013
 
3.
It is the universal word used to poke fun at one another. May be used as a negative putdown or used as a light joke.
Hah! Jeremy just tripped, what a geenis!

I hate Fred! Hes just a little geenis!
by Aaron P M September 23, 2005