Top Definition
an overly defensive fanboy who patrols in a forum for negative comments about the forum's topic, and shows no respect for people's right to criticize by changing the subject to (insulting) the critic.
ordinary moviegoer, "This movie sucks because the plot is so deliberately confusing..."

fantroll, "OMG, you are so stupid its unbelievable, you obviously don't have the brain to grasp how brilliant Inception is, go watch Twilight you idiot."
by yxuz February 16, 2011

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