1. A popular slang word in Internet gaming, used to insult and demean an opposing gamer as if they were inexperiened or completely inept at their respective game.
(Newb derives from Newbie. noob, nub, n00b are all acceptable substitutions for newb. It is commonly thought today that noob predates newb, which is incorrect. Real newbs have created a rift between the words newb and noob, which in reality is a mistake because they are synonyms. It is believed in the last 2 years with the emergence of kids born post-1990 in the gaming world that noob has become the more popular of the two because these newbs are searching for their own identity and 'original' word.
3lite H4x0r: stfu stop being a newb
newb 14 year old: lol ur a noob.