boiling hot

baking hot

Very hot.

blow hot air

To engage in empty or exaggerated talk that lacks substance, credibility, or truth; to bluster.

blow hot and cold

To behave inconsistently; to vacillate or to waver, as between extremes of opinion or emotion.

boiling frog

A person who, or thing which, is in a gradually worsening situation without any realization of the peril until it is too late.

boiling mad

extremely angry; furious.

boiling point

The state of being heated, with high aggression.

come in hot

To enter the scene of conflict quickly and aggressively.

full of hot air

Talking a lot, especially without saying anything of value or meaning.