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1.
Similar to racism or sexism. Only rather than discriminate based on race or sex, a fandomist will persecute and or make biases of an individual based on the fandom(s) he or she follows.
Dude1: Man, bronies are stupid loosers!

Dude2: Pal, thats pure grade fandomism.
by Coolclaytony March 16, 2012