When someone uses the phrase "....made a pass at me", what does that mean?

When someone, usually a woman, says that someone else made a pass at her, what does she mean?

I know the general meaning. But what I want to know is specifically… what are examples of these passes? What exactly did the man making the pass say or do, specifically? Actual examples of actions would really inform me. Actual examples of the words the man says would inform me.

What are common passes that are acceptable? And what are common passes that are unacceptable? (and yeah, I know it also depends on the context of the situation and the two people involved, so let’s just generalize or provide real life examples)