Do You Ever Say 'My Bad'?

This isn't some new expression, and I am surprised to hear that younger people use it. I had friends in school whose parents said it, and they learned it, too. This was 30+ years ago. I always considered it a regionalism, much like calling a drinking fountain a bubbler, and most regional expressions are not "proper English".
 
no and I also don't call females "dude"
If younger people want to do this, it's OK with me but I heard a mature woman calling a girl "dude" recently and she seemed ridiculous to me