hot and cold

a cold day in July

The time of occurrence of an event that will never happen.

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 hot

Extremely hot (having a high temperature: of an object, the weather, a living creature).

catch a cold

To contract a cold.

cold cash

Money, regarded as an incentive that can override any doubts or ethical concerns.

cold chills

Feelings of fear.