face rat
A two faced rat is a hypocrite who treats you like dirt but acts like they're the king of the world. They're terrible to people who care about them.
My ex is a two faced rat. He said he loved me, then he cheated on me.
My friend is a two faced rat. He said he would help me, then he didn’t.
My teacher is a two faced rat. She said she would give me an A, then she gave me an F.