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

Claus-trophobia.

Why was the snowman invited to all the holiday parties?

Because he's a cool guy to have around!

Why did the mischievous reindeer get sent to the principal's office?

He was caught stag-ing a prank!

Why did the Christmas tree go to the barber?

It heard it was time to get a good trim and 'Deck the Halls!'