All there

Is he all there?

I don't think he's all there...

I think he's not all there...

She's pretty on the ball ... she's definitely all there.

A suspicion that “he was not all there,” and therefore “one of God’s bairns,” had insured him, during his long orphanage, the food, and clothes, and shelter, necessary for life; but no one had given him love.

His submission is that he is of Mongolian extraction and irresponsible for his actions. Not all there, in fact.

[S]he smiled at me in a such a silly way, I thought to wonder if she was all there.