let down (one's) hair

let down (one's) hair

To cease acting formally or conservatively; to let go of one's inhibitions or reservations. Come on, Jim, this is a party! Let down your hair and go a little wild!
See also: down, hair, let
Farlex Dictionary of Idioms.
See also:
  • let one's hair down, to
  • let go of
  • let go and let God
  • let (someone or something) get out
  • let us (do something)
  • Let us do
  • let (someone or something) get out of (something)
  • let it roll
  • Let it roll!
  • let in