Santa Claus (1959)
Plotline: I'm not precisely sure. I think the gist of it is this: Santa Claus is trying to deliver presents. Pitch (a minion of the devil) is trying to get kids to be bad and also trying to thwart Santa's deliveries.
Scariness factor: This isn't a horror movie, and yet it's the creepiest damn thing I've seen in a long time. It feels like a really really really really really bad acid trip.
High Points: Wow. This isn't a horror flick, so technically I shouldn't be reviewing it here. And yet, when up against some of my other favorite creepy X-mas gems (Jack Frost, Santa Conquers the Martians, Silent Night, Bloody Night), it definitely is a worthy opponent. Somehow the movie is 94 minutes long, and CLEARLY they're milking many of the scenes to achieve that length. Much of it is filler, particularly a lengthy sequence at the beginning where Santa plays a creepy organ while introducing his child slave-labor from all over the world that he apparently utilizes instead of elves to make X-mas presents. (Let the creepiness begin.) Somehow a minion of the devil enters the picture, and he prances and ballets his way through the movie, committing bad deeds. The main little girl in the movie looks SINCERELY scared throughout the whole movie, probably because she has to endure sequences in which large two-faced dolls swarm around her, dancing, nightmares of Pitch (the devil) telling her she won't get anything for X-mas because she's poor, etc. Merlin (yes, you heard me correctly--Merlin the Wizard) is one of Santa's helpers and is featured in the film several times. Santa is contestably one of the creepiest Santas I've seen, laughing maniacally throughout. (He also looks weirdly like Leslie Nielsen.) Santa's reindeer are equally creepy--they are wind-up robotic reindeer, and one of them has a briefly terrifying scene during which he neighs/winnies/robotically whines/chew/moans in such a way that I got shivers up my very spine. Pretty much the whole movie feels like a really long and really really really bad acid trip. And for that reason, it is priceless, and you need to get your hands on it. Keep your eye out at (I hate to say it but) Walmart apparently--I guess you can get your hands on it there for the low low price of $1.
Overall: An X-mas miracle.