1 definition by MJwins

Thumb Humper

A dorky guy trying to be cool on the internet by talking smack to people for random thrills. This person is usually found annoying by everyone. He could be playing an internet game, leaving rude youtube comments, or spamming lameness upon social networking sites.

Yeah, don't pay attention to that thumb humper. He's been bugging people all day!

by MJwins June 21, 2010