let it all hang out

verb3

1. •
   Be utterly unrestrained and uninhibited.
2. •
   Behave without shyness, timidity, or worry about the reactions of other people; being perfectly candid and without concealment of one's feelings or intentions in expressing oneself or revealing one's emotions.

   • Or more specifically, to bleep only part of a potentially offensive word in a broadcast-news story or to let it all hang out? — 2015
3. •
   Make the utmost effort at some endeavor, utilizing all of one's ability and resources, keeping nothing in reserve.

   • "Hope he has a couple of easy innings," said Turner. "Sit down and cool off, young man." "Let it all hang out now, Tits," said Whisenant "don't hold back out there." — 1962