Top definition
An incredibly thick penis. Because of the extreme thickness, there are no condoms that can contain this massively wide unit. In order to have intercourse, one must wiggle their dick like a worm for several minutes to burrow in even the loosest of vaginas.
Did you see Philip's girth worm? It was huge!
by Flip Flossy June 28, 2012
Get the mug
Get a Girth Worm mug for your Facebook friend Helena.