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.
by Phuqit October 14, 2010
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.
by MetalWarrior99 July 27, 2006