In some areas of America or among a group of friends, Narun00b replaces the often negative word Narutard due to the belief that, in that area, it carries a title of extensive and unmatched knowledge of the anime series, Naruto (usually those who keep up with the Japanese manga).
Narun00bs are best put into three categories.
Those who watch the Japanese anime of Naruto.
Those who watch/read the English anime/manga of Naruto.
Those who read Wikipedia articles on Naruto and think they know everything.
The things that all of these types of people have in common to make them Narun00bs is their stubborn idiocy. They often argue with Narutards about things that have happened exclusivly in the japanese anime or Japanese manga, and therefore that they know nothing about.
Narutard: "So then he took Zabuza's sword and left with Sasuke to--"
Narun00b: "LOL WUT?! NOBDY HAZ ZABAZAAZ SORD, UR SO BEHIND, LOLZ. KEEP UP WIF DAH SEREZ, STOOPID."
Narutard: "...Was I talking to you?"
Narun00b: "SRY, UR JUST SO WRONG. OMG R U STUPID?! SEEN PAST THE 10 EPIDOSE, GEEZ?! ZABAZ SO DED."
Narutard: "I was talking about the jap--"
Narun00b: "GAWD, IGNRANT FANS LEIK U MAKE ME SICK."
Narutard: -punches- >:| "SUIGETSU, BITCH."