不爽滚回你妈肚子里
[bù shuăng gŭn huí nĭ mā dù zi lĭ]
This name could be translated as 'If you don't like it, go back into your mom’s womb' and is a rather rude expression to tell someone who is upset to simply get lost or just go away. The wording of this kind of nickname would typically not actually appear for a stranger to see.