The difference between Chill out and Cool one's jets

When used as verbs, chill out means to relax or take time out, whereas cool one's jets means to become less excited, intense, or active.

check bellow for the other definitions of Chill out and Cool one's jets

Chill out as a verb (intransitive, slang):

To relax or take time out; to calm down.

Examples:

"synonyms: chill"

"Since I'm between projects, I think I'll just chill out."

"I wish I could chill out about the neighbor's barking dog, but it wakes me up every night."
Chill out as a verb (intransitive, slang, somewhat dated):

To hang out; spend time together with another person or group.

Examples:

"synonyms: chilhang out"

"Hey, we should chill out together this weekend."

Cool one's jets as a verb (informal):

To become less excited, intense, or active; to exercise self-restraint.