I've got to learn some key Japanese phrases. For example, I need to know how to say, "I don't care," and also I really should learn how to say words like "rude", "impolite" and "snot-nosed-kid" as well as "Tell it to your mom."

The reason for this is, as you may expect, that I've been dissed. Not only have I been disrespected, but it was by a 12 year old. That's the worst. In my Junior Highschool private lesson with 4 girls one of them with help from her dictionary and some friends,laboriously informed me, "I don't like English-Speak humans."
While it was funny in some ways, her general attitude pretty much sucks in general and i would have given a great sum of money to be able to lay into her they way I want. Here is what I had in mind:

"I don't care. Shut your damn mouth you whiney, snot-nosed-kid. What the hell do you know about 'English-speak Humans' anyway. If you don't want to learn English, fine, don't come and fuck around in my lessons any more. None of these other kids give me the bad attitude that you do, what is your problem. If you have a problem with all gaijin, tell your parents and have them take you out of here. Stop wasting your parents money and my time."