Nah, I'm not Chinese.
You say it when someone is trying to explain something, and you're too lazy to listen, so you just interrupt them like they're a broken radio.
Nah, I'm not Chinese. I'm just here to laugh at you. You're the one who's Chinese.
Nah, I'm not Chinese. I don't know what Chinese is. I'm not Chinese. I'm not Chinese. I'm not Chinese.
Nah, I'm not Chinese. You're Chinese. I'm not Chinese. I'm not Chinese. You're Chinese.