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Someone who is totally for the good guys in any story because they are the good guys. They usually hate the idea of sympathy for the bad guy and will not usually do something like play an evil character in an RPG.
Guy 1: The Empire is bad ass, right?
Guy 2: No way, Alliance is where it's at.
Guy 1: The Rebels are cool and all, but not as cool as Stormtroopers
Guy 2: But the Empire is evil.
Guy 1: Damn, you're a good guy sider.
by Flameboy_silentbob July 05, 2008

Words related to Good Guy Sider

bad bad guy evil good good guy stuff