let your hair down

let (one's) hair down

To cease acting formally or conservatively; to ignore or relinquish one's inhibitions or reservations. Also worded as "let down (one's) hair." Come on, Jim, this is a party! Let your hair down and go a little wild!
See also: down, hair, let
Farlex Dictionary of Idioms.

let your hair down

COMMON If you let your hair down, you relax and enjoy yourself, and do not worry about being dignified or behaving correctly. It is only with friends that most people feel they can let their hair down and be themselves. He enjoyed all the jokes, but you got the impression he couldn't really let his hair down.
See also: down, hair, let
Collins COBUILD Idioms Dictionary, 3rd ed.

let your hair down

behave wildly or uninhibitedly. informal
See also: down, hair, let
Farlex Partner Idioms Dictionary

let your ˈhair down

(informal) relax completely and enjoy yourself, especially after a period when you have not been able to do so: Why don’t you let your hair down a bit? Come out with us for the evening.In the past, women wore their hair tied up when they were in public and only untied their hair in private or in informal situations.
See also: down, hair, let
Farlex Partner Idioms Dictionary
See also:
  • let (one's) hair down
  • let hair down
  • let one's hair down
  • let down (one's) hair
  • let one's hair down, to
  • part with
  • part with (someone or something)
  • give up the fight
  • give up the struggle
  • cancel out of (something)
References in periodicals archive
St Kentigern Hospice will host a fabulous karaoke evening with a twist which will allow you to let your hair down and sing your heart out like nobody is listening - because in fact they will all be joining in.
Hospice calls all Supertroupers for karaoke
Don't miss this irresistible feel-good show that will have you smiling for days - let your hair down and book now Hairspray is at the Liverpool Empire Theatre, Lime Street, from April 16 until April 21.
Pick of the Week Hairspray
STEVE MILLER BAND Let Your Hair Down (Roadrunner) * FOLLOWING the Steve Miller Band's last release Bingo - one of the best albums of 2010 - comes the follow-up, Let Your Hair Down.
BEVAN'S HEAVEN
Walkabout is a fantastic place to let your hair down after a hard week at the office.
FREE WRAP OR SANDWICH At WALKABOUT
Police will be giving out the message "let your hair down, not your guard" as well as handing out the stern message to male clubbers of "no consent, no sex" reminding them of the serious consequences of sexual assault.
Clubbers 'stay safe' - advice
I'm not surprised you let your hair down after the hard work of bringing up a baby.
Your Life: Dear Miriam - Confess all to your husband; ADVICE YOUR VERDICT
By night, let your hair down for romantic "I'm just getting in from the beach" ringlets.
Turning up the heat
LET YOUR HAIR DOWN: (From left) Andrew Mead, Damien Surbey, Sarah Digger, John Aherne, Nova Cooney, Kelly Turley, Chantelle Surbey and Scott Judge-Porter and (below from left) Karen Swift, Laura O'Kane and Sinead Miller
CLUBSCENE: CAREY'S; THE VIBE
If you are going to let your hair down, all of you should be able to let your hair down."
How soldier woke to a 'rape victim's ordeal'
"It's simply a great time to let your hair down and enjoy yourself.
Stoudt's Brewery set for 13th fest
LET your hair down with the latest in our classic Ladybird book collection, the tale of Rapunzel, held captive in a tower.
FREE Ladybird book today; CLASSIC KID'S COLLECTION
THE traditional view of the office party as a time to dress up and let your hair down is no longer true, researchers say.
Office party hits a low
They've been a firm favourite with the Sloaney set all summer (yes, we're talking about you, Victoria Hervey) but it's time to let your hair down, girls.
FASHION: FASHION LOUNGE: Checking out
LET your hair down at Jaks - the joint that's jumpin'' - where anything goes!
Great New Attractions For Your Family To Enjoy: Jaks