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A person who shows early signs of becoming a serial killer, especially children between ages 0-9.

See pain in the ass.
-Hey, did you see that kid over there?

-The one who just kicked tried choking the kid on the animal chair?

-Yeah, that one. He's trying to feed him ants he picked off of the bottom of his shoe now.

-Jesus Christ, what a Sweeney Toddler.
by Acephalism February 07, 2011
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