Top definition
When a male goes to the bathroom to urinate and does not remove his belt, so he unzips his pants and sticks his penis through the opening through the front of the boxers and through his zipper opening.
"Dude i went to the bathroom and i was about to zip up my pants, then i stopped myself before i gave myself a bathroom guillotine!"
by Redsxfan34 April 19, 2010
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