(1 & 2 were offending people; my bros wanted me to add it; sorry)
3. Gyfindor: Do what's right. Ravenclaw: Do what's wise. Hufflepuff: Do what's kind. Slytherin: Put a basilisk in the castle.
4. Knock knock.
Whose there?
You know.
You know who?
He's dead, you can say his name now.
5. Why did Potter cross the road? No reason, but someone will write a book about it. Why did Malfoy cross the road? To swing his hips at Potter. Why did Crabbe and Goyle cross the road? Malfoy did. Why did the Dark Lord cross the road? Potter couldn't stop him. Why did the Death Eaters cross the road? The Dark Lord ordered it.
6. We've all got thing Voldemort doesn't have-- noses.
7. Snape: *finds RavenClaw outta bed; takes 10 points from Gyfindor* Dumbledore: Wait, Slytherin won the House Cup? Let's give 500 points to HP for breathing.
8. Ron: I dunno if I'm more scared of Snape-- or my own mother.
9. Teenager: I'm a wizard! Someone else: Prove it. Teen: Sorry, no magic outside Hogwarts.
10. Dumbledore: And the next champion is.... YOUR MOM. OK WHO WROTE THIS?
11. (This is my own joke; don't let it offend you) *sees H. Clinton on TV; thinks about her blowing up the world; chuckles to myself* At least she's not as bad as Umbrdge.