床上狼狈证明我们曾经恩爱
[chuáng shàng láng bèi zhèng míng wŏ men céng jīng ēn ài]
It implies an intimate relationship experience that has gone through its highs but now perhaps faces decline or change, possibly referring to an intense period within a romantic relationship history where passion existed but also brought chaos and confusion. But it must be said that the connotation here can often tend to be vulgar depending on different situations and environments.