Third-person singular simple present indicative form of cool down

(idiomatic) A party to celebrate when a person decides to leave a house or flat, and sometimes to help prepare the space for the incoming residents.

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

A length of time in which the two sides to a purchase agreement, or contract can think things over and cancel with no penalty. This period is often stipulated by national law. In the UK it is currently (2008) 14 days. In many countries it is 10 days.

Alternative form of lose one's cool

(idiomatic) To become upset or disconcerted; to lose one's temper.

(idiomatic) To remain composed, calm, and even-tempered, especially in a provocative situation.

(idiomatic) To keep one's cool; to stay calm.

(idiomatic) To wait, especially impatiently or restlessly.

(Internet slang, colloquial) Used to dismiss a comment perceived as boring or pointless, or refute an anecdote that one considers difficult to believe.