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1.
A person who, in spite of their intentions, will act as a catalyst or "troll food" by calling out a troll in the act of trolling.
Person 1 aka The Troll: "I think The Beatles is totally overrated and utterly useless as musicians"

Person 2: "You gotta be kidding! The Beatles has created countless hits - more than any other bands! That alone is proof of their great achievements"

Person 3 in reply to Person 2: "Dude, dont be a troll catalyst! person 1 is obviously trolling - You're feeding the troll"
by MrMusicDK December 16, 2011