Favorite Expressions For Someone Who's Not All There

[Melki]

His elevator doesn't go all the way to the top.

[Melki]

He's a few peas short of a pot pie.

[Joe]

A few sandwiches short of a picnic.

[Rebecca]

A few bricks short of a load.

[Mathew]

Melki wrote: "His elevator doesn't go all the way to the top."

I just heard someone say, "his elevator doesn't go past the fifth floor"

[Melki]

(Livin' in farm country, we call that last incident, "Shut the barn door before the tractor rolls out.")

[Rebecca]

Out to lunch.

[Mathew]

The lights are all on, but, nobody is home.