I'm not going to talk to my grandma anymore.
Why? Did your grandma do something wrong?
She cut me out of her life for over two years. And she wrote awful things on my mom's Facebook wall about me.
I understand why you're upset with your grandma, but it might be a good idea to talk to her. She's an old person who might not be around for much longer, and you might regret not talking to her while you have the chance.
Nope. I don't give a shit. She can die. Serves her right.
I don't feel that you mean what you're saying as it is your grandmother and she may have raised you growing up and helped your parents with any problems with you while you are a kid. I suggest you forgive her and make sure that you still would have a relationship with her.