that's your/his etc problemspokenDON'T CARE used to say rudely that someone else is responsible for dealing with a situation, not you 那是你的/他的等问题〔用于表示应由他人负责处理某情况，而非自己〕 If you miss the train, that’s your problem. 要是你赶不上火车，那是你自己的问题。
that’s your/his etc problem• Anyway, that's your problem.
→ that’s your/his etc problem at problem(4)