simmer down

verb

1. informal,  (intr) to grow calmer or quieter, as after intense rage or excitement

2. (tr) to reduce the volume of (a liquid) by boiling slowly

Idioms and Phrases

Become calm after anger or excitement, as in Simmer down, Mary; I'm sure he'll make it up to you, or I haven't time to look at your report now, but I will when things have simmered down a bit. This idiom derives from simmer in the sense of “cook at low heat, below the boiling point.” [Second half of 1800s]

Related Words

• allay 
• alleviate 
• appease 
• assuage 
• cool 
• mitigate 
• mollify 
• pacify 
• placate 
• quiet 
• relax 
• relieve 
• settle 
• soothe 
• steady