"Why should all England have gone dotty on the mere subject of dottiness?"

'The Cabinet will go dotty if you've been mixed up with two nasty businesses in one week.'

She was obviously going dotty.

I should go quite dotty without work, and there is none for me in Venice now.

The children, who are pretty sure that Mom's going dotty, can't understand why she's suddenly enraptured.

After Dougal asks himself if he's "going dotty", Zebedee bounces away.

Finally, over the years, sophisticated pop fans have gone dotty over Cleo Laine.

Is she going dotty with being too lonely?

I went so dotty about her that I broke the golden rule and saw her a second time.

But it seems he's gone a bit dotty.