not all there

be not all there

1. To not be mentally sound; to be crazy or mentally deranged. A: "Look at that guy talking to himself on the corner." B: "I reckon he's not all there."
2. To not be very bright or intelligent; to be dimwitted. Jim's a nice guy, but with some of the foolish things he does, I think he's not all there.
See also: all, not, there

not all there

Fig. not mentally adequate; crazy or silly. Sometimes I think you're not all there. Be nice to Sally. She's not all there.
See also: all, not, there

not all there

not in full possession of your mental faculties. informal
See also: all, not, there

not all there

mod. crazy; stupid acting. You can’t depend on Paul for much help. He’s really not all there.
See also: all, not, there
References in periodicals archive ?
Well, that is all very well and good, but that is not all there is to know, and this notion that we somehow, as Protestants, can understand and explain everything--not just as Protestants but as western Protestants, and not just as western Protestants but as American western Protestants, and not just as American western Protestants but as American western modern Protestants--that we have it all down; and that's why there's no more fun in it.
The death of a paradigm
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