Turn the guitars up full and let it rip.

把吉他的音量调到最大，尽情地玩。

《柯林斯英汉双解大词典》

Just tell him how to start it up and let 'em rip, right?

仅仅告诉他们如何启动就让他们去开车，行吗？

youdao

But when it comes time to get in front of potential clients, let it rip.

FORBES: Magazine Article

But for the director, Kathryn Bigelow, the case is mainly an excuse to let it rip.

NEWYORKER: Strange Days

Translation: Apple is about to let it rip.

FORBES: Leopard On The Prowl