This episode is hilarious, with the evil santa and the new holiday Xmas (Christmas being an archaic prononciation like ask which is now or will be aks).
This episode cracked me up from Fry choosing between the lizards and the parrot to Zoidberg's pogo stick.
My favourite part of the whole episode was the classic Xmas song:
"He knows when you are sleeping
He knows when you're on the can
If he sees you he'll blast your ass from here to Pakistan!
Oh, you better not breathe
You better not move
You're better off dead I'm telling you dude
Santa Claus is gunning you down!"
I'll end this review with a few classic Santa quotes:
"Your missletoe is no match for my TOW Missile"
"I'm gonna shove coal so far up your stocking you'll be coughing up diamonds!"
"I'll be back. Back when you least expect...NEXT XMAS!!!"