Munchkin (role-playing games)
In gaming, a munchkin is a player who plays what is intended to be a non-competitive game (usually a role-playing game) in an aggressively competitive manner. A munchkin seeks within the context of the game to amass the greatest power, score the most "kills", and grab the most loot, no matter how detrimental their actions are to role-playing, the storyline, fairness, teamwork, or the other players' enjoyment. The term is used almost exclusively as a pejorative and frequently is used in reference to powergamers.
The term was applied originally to young gamers by older players, presumably because the connotation of being short and ridiculous (like the Munchkins in the book and film The Wizard of Oz) made it an apt label for the childish gamers it was applied to. However, before long it came to refer to anyone who engaged in a juvenile gaming style no matter their height, age or experience.
Munchkins are often accused of twinking or roll-playing, a pun on "role" that notes how munchkins are often more concerned with the numbers and die rolls than with the roles that they play.