What is a o or minfo or something Like That i dont knw how to spell it.?

Okay so i waz layin down with my ex and we were plyin around but he knw that this one part of my stomach i hate for people to touch because im extremely ticklish and like that part is like a spot and he knws that but then he touched it anyway and i jumped and he started laughing and was like you are a mimfa mimfo o or mimfo i dont knw how to spell it or what it mean do anyone knw please help and tell me what that mean lol...please.