What do you call a present that arrives after Christmas?

A past present.

What do you call Santa's fear of being stuck in chimneys?

Claus-trophobia.

Why did Santa's elves go to the North Pole's IT department?

They needed to update their sleigh-ware

Why did the head elf take a course in public speaking?

He wanted to learn how to deliver his *present*-ations more effectively.