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a nerdy/dorky/geeky person (most likely male) who lives in the basement of their mother's house and is around the age of 35 (ages may vary according to level of bitchdom). Symptoms may begin to occur around adolescents when the subject engages in too much video game activity or scholastic endevours (eg halo, counter strike, math club, and science fairs). Typical behavior includes excessive amounts of time engaged in internet browsing, over-emotional reactions to loss at FPS games, comic book reading, Sci-fi entertainment in the form of movies or the television station.
Brian is 35 and is THE Dungeon Master...he has never had a girlfriend and his only true friends (as in not those he knows from internet forums) work at the video game store.

That guy is a basement bitch.
by JediPrinczess January 29, 2006
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