- A few fries short of a happy meal.
- The wheel's spinning, but the hamster's dead.
- Couldn't pour water out of a boot with instructions on the heel.
- Doesn't have all his dogs on one leash.
- Doesn't know much, but leads the league in nostril hair.
- Elevator doesn't go all the way to the top floor.
- Forgot to pay his brain bill.
- A few clowns short of a circus.
- If he had another brain, it would be lonely.
- Too much yardage between the goal posts.
- An experiment in artificial stupidity.
- A few beers short of a six-pack.
- Dumber than a box of hair.
- A few peas short of a casserole.
- Doesn't have all his Corn Flakes in one box.
- One Fruit Loop shy of a full bowl.
- One taco short of a combination plate.
- A few feathers short of a whole duck.
- All foam, no beer.
- The cheese slid off his cracker.
- Body by Fisher, brains by Mattel.
- Has an IQ of two, but it takes three to grunt.
- WARNING: Objects in mirror are dumber than they appear.
- An intellect rivaled only by garden tools.
- As smart as bait.
- Chimney's clogged.
- Her sewing machine's out of thread.
- His antenna doesn't pick up all the channels.
- His belt doesn't go through all the loops.
- Missing a few buttons on his remote control.
- No grain in the silo.
- Proof that evolution can go in reverse.
- Receiver is off the hook.
- Several nuts short of a full pouch.
- Skylight leaks a little.
- Slink's kinked.
- Surfing in Nebraska.
- In the pinball game of life, his flippers were a little farther apart than most.