simple past tense and past participle of loosen up

(intransitive) To become loose; to loosen; to relax (a muscle, etc.). / (colloquial) To relax; to act less seriously.

Third-person singular simple present indicative form of loosen up

present participle of loosen up

The action of relaxing, especially relaxing the muscles before exercise, sport, etc.

plural of loosening up

(idiomatic, colloquial) To allow greater freedom (to someone); to relax control of (someone).

(idiomatic, colloquial) To increase spending or allow increased spending; to relax control of spending.

(idiomatic) To cause (someone) to be less cautious or more free in what they say.