Fats and his owner, Corky.

Abracadabra, I sit on his knee. Presto Chango, and now he is me. Hocus Pocus, we take her to bed. Magic is fun! ....We are dead.
~ Fats

Fats is the main antagonist of the horror film "Magic" and is a ventriloquist dummy who begins to grow into a foul-mouthed psychopath with a life of his own who torments his owner and ultimately tries to take over - the battle between Fats and his owner is made all the more symbolic by the fact his owner suffers from multiple personality disorder, with Fats in many ways embodying the negative personality buried within.

Fats is foul-mouthed, possessive and at times homicidal in nature - all traits of a sociopath.

He is voiced by Anthony Hopkins who plays Corky in the same film and Hannibal Lecter in The Silence of the Lambs, Hannibal and Red Dragon.