https://en.wiktionary.org/wiki/let_it_all_hang_out https://en.wiktionary.org/wiki/let_it_all_hang_out > (idiomatic) to relax and be carefree > Synonym: let on

https://en.wiktionary.org/wiki/let_it_all_hang_out https://en.wiktionary.org/wiki/let_it_all_hang_out > (idiomatic) to relax and be carefree > Synonym: let one's hair down