I don't describe games as munchkin (game here means all the players together with the DM). If a game is going to be too power-gamey for my taste, I'll decline to join.
That doesn't mean that there aren't gamers that are munchkins, though. Which doesn't mean that munchkins are bad people, not fun to be around, or that we don't want you in our game. It's just really easy for an individual player to get so wrapped into his dreams of power that he forgets the enjoyment of everyone around him. That really the only time that a mature munchkin player should choose to restrain himself.
That doesn't mean that there aren't gamers that are munchkins, though. Which doesn't mean that munchkins are bad people, not fun to be around, or that we don't want you in our game. It's just really easy for an individual player to get so wrapped into his dreams of power that he forgets the enjoyment of everyone around him. That really the only time that a mature munchkin player should choose to restrain himself.