Munchkin

munchkin, n., adj. 1. pejorative term to describe a young or inexperienced game player; a proto-gamer or gamer-wannabe. 2. a gamer who is younger than college age. Also newbie, howard. [GJ1]
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Addendum: Here is the archetypical munchkin -- he (always he) is in junior high; haunts the weekly game at the local gaming store; he's a metagamer and a power gamer, with a poor understanding of the rules and no understanding of the milieu; he buys the latest gaming gear with his parent's money, and then expects everyone to be impressed; he's loud, obnoxious, disruptive, fatal to party cohesion, and always has to leave early when his mom picks him up. Everyone hates munchkins, but at stores and cons they are almost impossible to avoid. The hacker equivalent is a "lamer." [GJ1]