The story
Borrowed from Cantonese 竹升 (zuk1 sing1). See jook-sing on Wikipedia.Wikipedia
Etymology from Wiktionary, CC BY-SA 4.0.
jook-sing
Today it means: A Chinese person, especially a Cantonese person born in the United States or Canada, who has overly assimilated to Western culture and has little or no command of any Chinese language. Full definition →