What is fräulein?

(n.) A german woman, particularly an angry blonde woman named Helga that has princess leia hair and a spiked helmet.

The fräulein picked me up and beat me.

fräulein - meme gif

A german word used to address unmarried women.
However, this is a pretty old word nobody uses anymore, except for grandparents.

My grandmother said:" Fräulein, the bill please."
and the waitress gave an odd look because of the old word.