Top Definition
man who removed his own penis
stands and unbuckles pants and drops them to his ankles, revealing a smooth, shaven crotch with only a thin scar to show where his genitals once were
by rob nash July 25, 2003
Males who have their genitals removed.
Mephisto is such a nullo
by Mephisto's dad July 25, 2003
a complete void of a man’s ability to ejaculate, due to extreme sexual activity
Annie was bragging to her girlfriends how she wore her boyfriend out last night…

”by the time I got done with Walter last night, he had nullo!”
by ReginaandRay February 22, 2007
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