back off

后退, 放弃

例句与用法：

John was ready for a fight but he backed off at the last minute.

约翰要准备打一仗的，但到最后的时候却退缩了。

I don't like that car sitting on my tail. Wave him to back off.

我不喜欢那辆车紧靠在我的车尾，挥手示意他倒车(离远些)。