run hot and cold
To alternate between two opposite extremes, such as enthusiasm and disinterest or success and failure.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“He runs hot and cold about his new job.”
“My friend runs hot and cold regarding our travel plans, so I never know if we are actually going.”
“The unpredictable investor runs hot and cold, showing great interest in the project one day and complete indifference the next.”
- 01
a cold day in July
The time of occurrence of an event that will never happen.
- 02
baking hot
Very hot.
- 03
blow hot air
To engage in empty or exaggerated talk that lacks substance, credibility, or truth; to bluster.
- 04
blow hot and cold
To behave inconsistently; to vacillate or to waver, as between extremes of opinion or emotion.
- 05
boiling hot
Extremely hot (having a high temperature: of an object, the weather, a living creature).
- 06
break into a run
To start running.
- 07
catch a cold
To contract a cold.
- 08
cold cash
Money, regarded as an incentive that can override any doubts or ethical concerns.
Last updated August 10, 2026