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Another name for a GSA (Gay-Straight Alliance) party. Usually consists of music, games, and people. Much like most parties. Or at least the ones that exist.

It's just a party that's celebrating one's own sexual preference, whatever it may be, and accepting and celebrating others'.
person 1: You going to that alt party tonight?
person 2: Cha! It's going to be awesome!
by GuilliMichen June 07, 2009
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