Twink

twink, n., MUDism 1. in online gaming, a power gamer. 2. on Everquest, a brand new character who starts with items and abilities "inherited" from another character. [DC]
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Addendum: Most gamers feel that "twink" came from Twinkie, as in the cream-filled snack cake; that a power gamer is effectively the junk food of gamers. Proponents of this theory point to the similar uses of "cream-filled" and "Twinkie" itself when referring to power gamers.