Creepmas
Creepy Christmas, when one of those creepy Christmas legends become true
Krampus: Ho Ho Ho! Merry Creepmas!
Scary Creepmas/ Merry Kreapzmas
A combination of the holidays, Halloween and Christmas, on the same day as Christmas
Krampas, skulls with Santa hats, trees with spiderweb, etc. Are all examples of what you may see on Kreapzmas (Scary Creepmas/ Merry Kreapzmas is what you may hear around Kreapzmas time.