rebound 回弹、回升

rebound guy/girl 备胎，本质就是temporary lover，临时情人

rebound relationship 分手后疗伤期随随便便谈的恋爱

例句：

I don't really like her, she's just my rebound girl, this rebound relationship doesn't count.

我其实不喜欢她啦，她就是个备胎而已，这段感情不算数。

虽然rebound guy/girl这个词很实用，但是这样没人性的话大家还是要少说。