American Idioms – Idiom Wizard Lists Over 5,500 Idioms & Slang Descriptions

Simmer down


Calm down. Ebb. Modify an emotional reaction. Refers to boiling water which vigorously churns like someone’s anger, so to reduce the excitement you can make it simmer with a lesser degree of heat, so this phrase suggests turning down one’s emotional reaction. (Compare to Settle down.)

“The first ten minutes of teaching kindergarten is crazy, but eventually the children simmer down and I can start class.”

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