A Racist or Stereotypical reference on Asian race (More like on Chinese Kinds) or a Racist Asian Language that many people wont understand except the person who speaks it right
The soundspots and pans make when tossed or smacked together, NOT to be used to insult a Chinese person. If you want to do that, talk about eating cats and dogs instead rather than saying and overused insult.
Jerry: "Hey Xiu! Ching Chang Chong!"
Xiu: "Shut the fuck up Jerry you Macdonaldshairline having fuck."