one sandwich shy of a picnic

one sandwich shy of a picnic

A pejorative phrase meaning not very intelligent or of questionable mental capacity. This expression can appear in many different forms and variations (e.g., several bricks short of a load," "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 sandwich shy of a picnic. The new manager is nice enough, but he's one sandwich shy of a picnic, if you ask me.
See also: of, one, picnic, sandwich, shy
Farlex Dictionary of Idioms.
See also:
  • a sandwich shy of a picnic
  • one brick short of a (full) load
  • one card shy of a (full) deck
  • several bricks short of a (full) load
  • several cards short of a (full) deck
  • sandwich
  • a few bricks short of a (full) load
  • a few bricks shy/short of a load
  • one brick shy of a (full) load
  • one brick shy of a load