more cocksure

As his banishment gets closer, he only grows more cocksure.

Mr. Trump is never more cocksure than when he’s talking about his sway over his supporters.

You have never met a more cocksure lot than the monetary-policy clerisy.

There'll be no more cocksure nyaffs engaging in beezer Whizzer And Chips-style capers while scampering around Bristol with their bums hanging out.

Quite so; but do you know the people here in the hotel take the view that we're not married because we kiss each other so much, and our occasional quarreling makes them all the more cocksure about it, because lovers usually carry on like that.