课本里找不到的地道口语表达

A: Mary, I'm sorry for cheating on you before. Do you see any chance that we can get back together? Mary，我真的很抱歉对你不忠。你看我们可不可能重修旧好呢?
B: I don't know, but you can kiss my ass. 不知道，不过你可以拍我马屁，讨好我试试。