newb definition
Wiktionary(0.00 / 0 votes)Rate this definition: 1  newb(Noun) A newbie; someone that is new at a game, or has a new character. That guy must be a newb at this game. 2  newb(Noun) when said of an experienced player, an admonishment from another experienced player that the first player has made a beginner's or careless mistake.