A young man finds his divorced mother having sex with a man in a Santa Clause hat and shoots them both dead. Years later, now thinking he is Santa Clause, the man develops an obsession with an erotic horror film star named Raven and begins stalking her.
That tagline is a total lie, but the movie is still plenty entertaining in a so-bad-it's-good way. Santa Claws was directed by George A. Romero's buddy, John Russo.