Sam and Dean in “Unfinished Business”

Sam

I mean, I'm just saying, that there's some version of the anti-Claus in every culture. You've got Belsnickel, Krampus, Black Peter, whatever you want to call it there's all sorts of lore.

Dean

Saying what?

Sam

Saying back in the day, Santa' brother went rogue and now he shows up around Christmas-time, but instead of bringing presents he punishes the wicked.

Dean

By hauling their asses up chimneys.

Sam

For starters, yeah.

Dean

So this is your theory, huh? Santa's shady brother?