A slur for somebody of Taiwanese background. For instance somebody from China is a "Chink", so somebody from Taiwan is a "Twink."
This word was thought of because Kuan does not want to be associated with Chinese, so he did not want to be called a Chink.
Alek: Hey Kuan, come here you stupid Chink.
Kuan: Fuck you, im not from China im from Taiwan.
Alek: Oh, so then... come here you stupid Twink.