Green’s Dictionary of Slang

(US) East Asian, esp. Chinese.

1949		H. Miller Sexus (1969) 65: A slat-faced Chink [...] tells me in chopstick language that a lady wishes to speak to me on the telephone.
2004		M.B. ‘Chopper’ Read Chopper 3 24: It is the first Aussie-Viet battle in Riosdon’s history [...] A little bit of slapstick humour. Or should that be chopstick humour?