The difference between Cool it and Cool one's jets
When used as verbs, cool it means calm down, relax, take a time out, whereas cool one's jets means to become less excited, intense, or active.
check bellow for the other definitions of Cool it and Cool one's jets
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Cool it as a verb (informal):
calm down, relax, take a time out
Examples:
"We did tell him to cool it but he just got more and more [[irate]]: he ended up hitting me."
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Cool one's jets as a verb (informal):
To become less excited, intense, or active; to exercise self-restraint.