Thanks Zed.
A part of the conversation:
Person 1: The students are on strike! Why?
Person 2: About ten days ago, our principal died, and someone else was appointed in her place. The students want the principal’s daughter to become the principal.
Person 1: Your principal’s daughter? How is she qualified? She’s still in school, isn’t she?
Person 2: Hey, when a politician dies, they see to it that his son, daughter or wife takes his place. Nobody talks about qualifications, then.
Person 1: Listen, I’m in no mood to argue. I need my shut-eye. Now, please leave.
Person 2: Do you have anything to eat?
Person 1: LEAVE!
sounds like a normal teenager to me. I don't think it means anything beyond, "ok, I'm done with this conversation now. do you have anything to eat?"