My college teacher and I had an argument because she kept making fun of me, so I told her to go away, and she said, "Why are you coming cocky?" What should I say to her in order to win the argument?

you can ask her a question too like

( why are you making fun of me )

you don't have to answer her question, just ask the/your question derectly.

but it's gonna look like unrespectful tho maybe you can just say to her that "nothing", but that means your gonna loose the argument