你说爱我开什么国际玩笑
[nĭ shuō ài wŏ kāi shén me guó jì wán xiào]
Saying you love me is some kind of international joke - conveys disbelief or cynicism in reaction to expressions of love, hinting at distrust in sincerity possibly because of previous experiences or doubts about the veracity or depth of emotions proclaimed by another.