What defines a noob?

[StompArtist]

I barely ever use 'noob' in a derogatory way.. Sometimes me and my friends use 'noon' or 'nub' or 'nun' as joke nicknames, but not in a bad way.

I didn't use too but my brain has now adopted the word. I was in a meeting with co-workers the other day and found myself thinking "Good God he's a noob. He'll get us all fired if we are not careful". lol