kick up your heels
US /kɪk ʌp jʊər hiːlz/
UK /kɪk ʌp jʊər hiːlz/

1.
羽目を外す, 楽しく過ごす
to enjoy oneself in a lively, uninhibited way, often by dancing or celebrating
:
•
After finishing the big project, they decided to go out and really kick up their heels.
大きなプロジェクトを終えた後、彼らは出かけて本当に羽目を外すことにした。
•
It's been a long week, let's kick up our heels this weekend!
長い一週間だった、この週末は羽目を外そう!