A funny or derogatory term for a person whom acted or tried to act like a fumbling chink who can't seem to speak or do right. Acting a fool, or trying to be what they arn't.

Somewhat like a cheeky-bastard.

Definitions for Chinky is the word, and the definition of Bastard is the word, but the total meaning is the slander or put down, such as:
Joe's acting like a fucking bastard.
(But Joe isn't a bastard child, he has both his Parents)