This is my back case! My back case means a lot, it may mean I don’t care, or I don’t mind. I am less concerned about it. Why should people even use this unhealthy language? Will you reconsider any lady who tells you this?
It also means after my departure I do care not about what happens later on. The phrase contains three simple words but has a deeper meaning. All the same, it will be better not to use it at all.