letting one's hair down

Verb

let one's hair down (third-person singular simple present lets one's hair down, present participle letting one's hair down, simple past and past participle let one's hair down)

1. (idiomatic) To relax and enjoy oneself.
   • Cut loose, let your hair down honey / Unwind, turn the lights down low / Relax, let's uncork the stopper / Come to papa, come on let's go1962, Roy Bennett, Sid Tepper, “Relax”, performed by Elvis Presley
2. Used other than figuratively or idiomatically: see let, one's, hair, down.