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loosen someone or something up
to make someone's muscles and joints move more freely by exercising them. The exercise loosened me up quite nicely. It loosened up my legs. I have to do some exercises to loosen myself up.
loosen someone up
Fig. to make someone or a group more relaxed and friendly. I loosened up the audience with a joke. Loosen yourself up. Relax and try to enjoy people.
to become loose or relaxed. Loosen up. Relax. We tried to get Mary to loosen up, but she did not respond.
1. To cause someone or something to become more loose or relaxed: After the big meal, I loosened up my belt. The trainer loosened me up with a massage before the fight.
2. To become more loose or relaxed: The knots loosened up, and the captives worked themselves free. They seemed shy at first, but by the end of the dinner, the guests had really loosened up.