What is "hot under the collar"

Usage examples of "hot under the collar".

The only difference was that the troopers weren't so hot under the collar.

You mean that all that time you just sat there letting me make an ass of myself, getting hot under the collar and preaching all those principles.

Bornan Thul was getting hot under the collar, the Corellian noted.

He was a little angry, a little scared, and very hot under the collar, but he kept well away from the brown - faced man until he saw the first train pull out.

I told Stephen to go along as Jack was a little hot under the collar.

He had to get away from them, for they were getting too close in ways that made him hot under the collar.

Bill got hot under the collar sometimes, but if you could just avoid instant mayhem, he soon cooled off again.