我不美不萌不温柔管你鸟事
[wŏ bù mĕi bù méng bù wēn róu guăn nĭ niăo shì]
It means that I am not beautiful, cute or gentle and you should none of my business.It's often used to refuse unwanted interference and show the determination to live freely according to one’s personal will without worrying about whether others think they are nice.