Spark a little original insult is always better than same old dusty boring word "noob". Be original when you curse! :) So here are some fun insults!
Beetle-Headed, Flap-Eared Knave (Ah, Shakespeare....)
Ultracrepidarian (A sophisticated word for person who likes to criticize, but does not know what they are talking about)
Hairy Butt Rash
Jack Bitch (A female jackass)
Suck a Prick (A good alternative to the overused "suck a dick")