one's heart out

/wˈɒnz hˈɑːt ˈaʊt/

/wˈʌnz hˈɑːɹt ˈaʊt/

one's heart out

in an intense, energetic, and enthusiastic way

Examples

1. The band played their hearts out in hopes of winning the prize.

2. I'd much rather be in a studio and dance my heart out than go to a gym.

3. You will fight your hearts out, but I want you to show respect, humility, honor!

4. I poured my heart out to him and then he told all his friends what I'd said.