“What does she have on me?” usually expresses insecurity, jealousy, or fear that another girl/woman has some kind of advantage or power over you. It can be emotional, social, or even “she knows something about me” type power.

Possible meanings

  • She has information on you
    The phrase “have something on me” can mean someone has embarrassing, damaging, or incriminating info that could be used against you.
  • She has an advantage over you
    It can also mean she has something you feel you lack: looks, status, money, confidence, history with someone you like, etc.
  • She has emotional power
    In relationships, it often means “Why is he choosing her over me? What does she have (beauty, attention, control) that I don’t?”

In online / trending context

  • The phrase shows up in songs, short videos, and memes about jealousy and comparison in love or dating.
  • People use it half-seriously, half-dramatically, to talk about feeling replaced, overlooked, or “not enough” compared to another girl.

If you’re actually asking about your situation

If you meant this about a real person in your life:

  1. List what you think she “has on you” (looks, info, social leverage, etc.).
  2. Ask yourself which parts are facts and which are fears or assumptions.
  3. Focus on what you do have: your own qualities, boundaries, and choices in who you let affect you.

If you share more context (romantic triangle, friendship drama, or someone literally blackmailing you), a more tailored breakdown can help you figure out what to do next.