What does it mean for father to die before mother?

Father died before mother, which generally means defending himself or describing a charlatan.

Source: Once upon a time, there was a man who asked a fortune teller to tell his parents what happened a hundred years ago in order to arrange the affairs of his elderly parents. The fortune teller revealed a bleak tone when reporting his parents' birthdays, saying, "Dad died before mom." The fortune teller said, "Sir, my mother is still here." The fortune teller said, "Yes, my father is one hundred years earlier than my mother." The fortune teller said, "My father was there, too." The fortune teller said, "Yes, your father will be one hundred years earlier than your mother." The soothsayer's wife said, "Sir, you are wrong. His mother died young. " The fortune teller said, "Yes, my father was here, and my mother died first."