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

• one's elevator doesn't go all the way to the top floor
• one's elevator doesn't go to the top
• one's elevator doesn't go to the top floor

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

1. (US, humorous) Used as an indirect way to say that someone is mentally deficient.
2. (humorous) Used as an indirect way to say that someone is crazy.

• full deckism
• not have both oars in the water
• one brick short of a full load
• play with a full deck