New or unskilled at a game. An extensive devolution of the the word newbie.
Much the same as noob, n00b, fr00b, ch00b or any of a variety of words which end in either oob or the leet speak equivalent 00b.
Typically used by young, arrogant and unskilled players in mmo's who prefer to insult others rather than playing a game as a mature gamer.
Very often followed with an exclamation mark.
"What a z00b!" "You're such a z00b!" "Escapedslave, you z00b! Get some skills!" or simply, and most commonly, "z00b!"