I missed the part where that's my problem - This is your go-to line when someone talks about something y

This is your go-to line when someone talks about something you don’t care about and it’s not your damn problem.

'I missed the part where that's my problem' when my dad kept nagging me about my grades.

'I missed the part where that's my problem' after my sister said I didn't help her with her project.

'I missed the part where that's my problem' when my friend said I didn’t invite her to the concert.