What does "妈卖批" mean?

非常粗的四川话粗口，直译就是“你妈卖淫”。常见句式为“我有一句妈卖批不知当讲不当讲”，含蓄而又直接地表达了想要干架的愤怒情绪。

ENVery vulgar Sichuan curse, which literally translates to 'your mom sells herself'. A common phrase is 'I have a 'mmp' that I don't know if I should say or not,' which subtly and directly expresses the angry emotion of wanting to fight.