1. An experiment in Artificial Stupidity. 2. A few beers short of a six-pack. 3. Dumber than a box of hair. 4. A few peas short of a casserole. 5. Doesn't have all his corn flakes in one bowl. 6. One fruit loop shy of a full bowl. 7. One taco short of a combination plate. 8. Cranially challenged. 9. All foam no beer. 10. The cheese slid off of his cracker.