A vegan who won't eat anything that casts a shadow.
As used on the Simpsons episode "Lisa the Tree Hugger", animal/enviornmental rights activist, Jesse tells Lisa that he is a level 5 vegan, who wont eat anything that casts a shadow. Such thing doesn't exist, mind you.
Lisa: Oh, the earth is the best! That's why I'm a vegetarian.
Jesse: Heh. Well, that's a start.
Lisa: Uh, well, I was thinking of going vegan.
Jesse: I'm a level 5 vegan -- I won't eat anything that casts a shadow.
A person who is horrible at halo, especially while play on xbox live. These people usually get pwned by almost every player they are faced against. You are often humiliated, and cussed at by the more experienced players. Not to worry, many many people are Halo Noobs which ultimately means you have a life.
PWNERXX27: Fucking halo noob!!!!111!! YOU SUCK!
YOU: At least I don't spend more than 20 hours a week playing this game!
PWNERXX27: AT LEAST I KNOW HOW TO PLAY THIS FUCKING GAME!!!!