(one's) elevator doesn't go all the way to the top

(one's) elevator doesn't go all the way to the top

A pejorative phrase meaning one is not very intelligent or of questionable mental capacity. He says he's going to start a business selling bees as pets. I'm starting to think his elevator doesn't go all the way to the top.
See also: all, elevator, go, top, way
Farlex Dictionary of Idioms.
See also:
  • elevator
  • the elevator doesn't go all the way to the top
  • bananas
  • one banana short of a bunch
  • one egg short of a dozen
  • a few bananas short of a bunch
  • a few eggs short of a dozen
  • a few sandwiches short of a picnic
  • a sandwich short of a picnic
  • a few bricks shy/short of a load