gigantapenis 

a word used by those with unusually small penis's in a last ditch effort to sway any interested or uninterested persons that they do in fact have a larger penis than the size of most sticks of chapstick

John and Anthony were trying to tell these girls that they had a gigantapenis, thats so sad

gigantapenis by Justin M. February 2, 2005

giganticpenis

A penis that is huge as fuck.

JPP has got a giganticpenis.
look at your pp, it's even larger than a giganticpenis!

giganticpenis by Tsukasa69 October 28, 2018