beyond one's depth

You'll have to take it from there, though; I'm out beyond my depth.

Carson had the sudden desperate sensation of being beyond his depth.

I was a little slower in getting courage to go out beyond my depth.

I'm afraid I got beyond my depth in it, but my intentions were good.

Shame about the old Solipsists, too, but such is life; they got involved beyond their depth.

The detective, until now a challenger, suddenly realized that he had stepped beyond his depth.

For the first time, he began to feel he was beyond his depth.

So far she hadn't managed to put in a word and the discussion was going further beyond her depth.

He's beyond his depth here and he wants to get back home as soon as possible.

He had been able to dog-paddle a little, just enough to get well out beyond his depth before panicking.