Noob

From NWN2Wiki

Noob is leetspeak and is meant as an offensive term towards someone who is not nessicarily new, and quite often is directed at someone that is somewhat experienced but at the same time stupid/disruptive and/or totally incapable of learning. A noob is almost always someone who thinks they're cool but obviously aren't, much like the writer of this article.

P.S. The use of the word "noob" should only be used while online. Use of the word outside your own front door isn't advisable.