be off somebody's head

We were making love, and I took the paper bag off my head.

He held the device just off his head, then turned on the power.

Some position for a doctor to be in, he thought- ready to shoot off somebody's head.

I'd like to know exactly why he's gone so completely off his head.

I must be off my head,' he said at last.

He was off his head for a long time, couldn't speak.

I was a bit off my head, don't worry about it!

I did not take my eyes off her head and neck.

"It would take a lot to send me off my head."

And enough of that is likely to blow the hair right off your head.