Santa Claus is actually a demon who lost a bet with an angel, so he became the giver of toys and happiness. But this year the bet is off, and Santa is about to return to his evil ways.
Santa's Slay is a 2005 Christmas black comedy slasher film written and directed by David Steiman, a former assistant to Brett Ratner; Ratner served as a producer. After a millennium of spreading Christmas joy due to losing a bet with an angel, Santa Claus reverts to his demonic self and gives the gift of evil and fear. The film stars Bill Goldberg, Douglas Smith, Emilie de Ravin, Robert Culp, Saul Rubinek, Dave Thomas, Rebecca Gayheart, Chris Kattan, and Fran Drescher.