not all 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