My teacher said I will be cursed..?

I transfered to a different school, and i still keep contact with my old friends. My friend said our teacher asked if anyone left the school, and they all said I transfered. And she said, "she will be cursed." Like, what the hell? What the **** is wrong with her? Im pissed because she barely knows me and suddenly decides to talk **** behind my back and i feel embarrassed by it. What should I do about it? I know her facebook page, lol, should I say something? Is this a big deal or am I overreacting? I've always hated her, lol. She's not a good teacher. She's a PE teacher who is just really not fit, and i'm taking about a muffin top overload. and she cant speak straight english! wth.