Release inhibitions (3,4,4,4)

I believe the answer is:

let ones hair down

(Other definitions for let ones hair down that I've seen before include "Make whoopee" , "act without reserve" , "lowering the shock level" , "party" , "Be a disgrace to Barnet" .)

I've seen this clue in the Universal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.