What do you think about me telling my sister to stop waving at me?
What was your reason for wanting your sister to stop waving?
She's a stupid bitch, I don't want to speak with her
It is not nice to continue to wave at someone for no reason. If your sister is doing this just to get on your nerves then try to not give her a reaction. Odds are she is only doing it to make you upset.
She did upset me. My sister is a dumb cunt. She's not a normal human. So fuck her and her waving.
I am sorry that she got you so upset. Is there a way to talk to a parent so that they can tell her how rude it is to keep waving?