What does Guizhou people mean by "auntie"?

According to our Guizhou dialect, Auntie means Empress (pronounced the first sound), which generally refers to the mother's sister. Generally speaking, it is a polite address for unmarried women.

If this is the case with you, this little girl is just taking advantage of you and being your elder.

In our Guiyang area, it is a joke between men and women of the same age, which belongs to goodwill.

That's basically what it means anyway. It is harmless. You don't have to care.