cool off

Verb

• feel less enamoured of something or somebody

• lose intensity
  • His enthusiasm cooled considerably
    

• become quiet or calm, especially after a state of agitation
  • After the fight both men need to cool off.
    
  • It took a while after the baby was born for things to settle down again.
    

Related words

• Synonyms: 
  cool , cool down , calm , calm down , chill out , simmer down , settle down , cool it