Net Nerd 

Someone who spends all of their time on the internet.

Poindexter is a 40 year old virgin. Why? Cuz he's a Net Nerd!

Net Nerd by Mike Comanche March 4, 2009

net nerd 

any opinionated smart ass who thinks because he has the power of anonymity he can flaunt his opinions without reprocucions

I think you should know a few of these people.

net nerd by The Omnipotent Seal March 28, 2003