Your dog's so dumb he chases parked cars.

You're so dumb you thought Taco Bell was a Mexican phone company.

Your armpits are so hairy you look like you've got Cher in a headlock.

You're so stupid, when the movie said, "No one under 17 allowed," you went to find 16 friends.

Your brother's so dumb he thought Jungle Gym was Tarzan's Dad.

Your house is so small the front and back doors are on the same hinges.

Your house is so small the front door mat only says WEL.

You're so skinny the librarian asked you to volunteer as a bookmark.

You're so dumb you flunked recess.

Your dandruff's so bad the principal had to declare a snow day.