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1. Trying to discredit a political group or movement by pretending to be a member of it online while posting ignorant or offensive comments.

2. Trying to discredit a political group or movement by bringing ignorant or offensive signs to a protest and pretending to be part of the protest.
YouTube commenter 1: I hate teh joos and I also think Barack Obama is awesome.

YouTube commenter 2: Quit false flagging you liar.
by Isaac Clark March 06, 2010
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2
Wearing a red bandana and trying to pass it off as a blood flag, even though you're not in any known blood set.
by DubbC November 01, 2007
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