A hybrid between "n00b" and "pro." The resulting gamer is very good at some aspects of the game (pro) and very new or inexperienced at others (n00b).
Gamer 1: Yo, host a game and I'll join.
Gamer 2: Sorry, I don't know how.
Gamer 1: OMGWTFLOLOLOL U FUXXING N00B
*Gamer1 gets pwned out of his pants*
Gamer1: Dood, you're such a pr00b.