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A person who uses Manic Panic hair dye to color their hair. The color palette of the dye is primarily florescent (pink, blue, green, bright red, ect.) and was widely used during the mid 1990's rave scene.
Remember when Lily Allen dyed her hair Barbie pink? She was rockin' the manic panicker look back then.

Those pseudo-rave kids at the club tonight were totally annoying. That one manic panicker looked like a douche with that crazy ass dye job.

I hate it when wrestlers or suicide girl wannabes go all manic panicker and dye their hair different colors every week.
by MellyInMay November 23, 2011
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