bricks shy of a load

a few bricks shy/short of a load

A pejorative phrase meaning not very intelligent or of questionable mental capacity. It can appear in many different forms and variations (for example: a few sandwiches short of a picnic, a few cards shy of a full deck, etc.). He says he's going to start a business selling bees as pets—I think he may be a few bricks shy of a load.
See also: brick, few, load, of, short, shy

one brick shy of a (full) load

A pejorative phrase meaning not very intelligent or of questionable mental capacity. It can appear in many different forms and variations (for example: a few sandwiches shy of a picnic, one card shy of a full deck, etc.). He says he's going to start a business selling bees as pets—I think he may be one brick shy of a load. The new manager is nice enough, but he's one brick shy of a full load, if you ask me.
See also: brick, load, of, one, shy
Farlex Dictionary of Idioms.

bricks shy of a load

Mentally impaired, either unintelligent or merely eccentric. For example, He may be handsome but he's not too bright-a few bricks shy of a load. This term, transferring a light load to lightweight mental capacity, is usually preceded by either a few or a specific number such as two . [Slang; 1960s]
See also: brick, load, of, shy
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • a few bricks short of a (full) load
  • a few bricks shy/short of a load
  • a few sandwiches short of a picnic
  • a few, two, etc. bricks short of a load
  • few bricks short of a load
  • one brick shy of a (full) load
  • one brick shy of a load
  • one sandwich short of a picnic
  • picnic
  • sandwich