cool off
phr. v..phr. v.. to become less hot after being very warm, or to become calm after being angry.
phr. v.. to experience a reduction in temperature or emotional intensity; can be used literally for physical heat or figuratively for anger and excitement.
Let's wait for the soup to cool off before eating.
After their big argument, he went for a long walk to cool off and clear his head.
The central bank implemented new policies to help the economy cool off after a period of dangerously rapid growth and high inflation.
often used without an object when referring to a person's mood or the weather.
contrast with 'cool down', which is almost identical but more common for physical exercise; 'cool off' often implies a return to a comfortable state from an uncomfortably hot one.
He needs to cool off his head.He needs to cool off.when used for emotions, it is usually intransitive and does not take an object like 'head' or 'anger'.