Nanodick 

Someone who's such an inconsequential and annoying prick that their capability to be truly obnoxious is reduced to a microscopic level, because no one bothers to pay any attention to their comments.

Bobby's always babbling about things that he can't even understand, that nanodick.

Nanodick by Phuqit October 17, 2010

nanodick 

The penis length is on the nanoscale (one billionth of a meter)yet the scrotum and testicles are normally sized.

Bill can't have sex with any normal woman because he has a nanodick.

nanodick by MetalWarrior99 July 27, 2006