Dumb as

bag of hammers

5. Doorknob

Rock stupid and borderline delusional.

7. A Post

8. 12 shy of a dozen
9. A bad spot on the disk.
10. A couple of open splices.
11. A few beers short of a six-pack.
12. A few bricks shy of a load.
13. A few cans short of a six pack.
14. A loose chip on the micro processor.
15. A quart low.
16. About as sharp as a bowl of jello.
17. About as sharp as a bowling ball.
18. About as sharp as a sack of wet leather.
19. About fifteen cents short.
20. About three cents short of a dollar.
21. All booster – no payload.
22. All crown – no filling.
23. All the lights don’t shine in her marquis
24. As thick as two short planks.
25. Attic’s a little dusty.
26. Back burners not fully operating.

A screw loose behind the wheel.

28. A bowl of hair