Green’s Dictionary of Slang

1. (Aus.) a Chinese person.

[1906		Truth (Sydney) 28 Oct. 11/1: To-day there are 20 whites to 150 Ah Pongs].
1910		Bulletin (Sydney) 1 Sept. 13/4: I was travelling between Perth and Fremantle by train, the other day, when a fat, full-blooded Pong got into the compartment. ‘Welly nice day,’ he said. [...] He was a Mongolian in absolute ecstasy.
1914		Bulletin (Sydney) 16 July 45/2: Can we still be Christians? Ask the wily Pong. / Learn ‘all samee Clistian’ doesn’t take him long! / Cut away the pigtail; don the breeks and coat; / ‘Gittum lillee white gal – gettum lillee vote.’.
1932		‘William Hatfield’ Ginger Murdoch 18: I got this thing [...] orf a Pong in Cunnamulla.
1941		Baker Popular Dict. Aus. Sl. 56: Pong, a Chinese.
1959		Stage (London) 7 Jan. 24/4: Ping and Pong the lively Chinese policemen.
1975		K. Willey Ghosts of the Big Country 177: There was Wallaby George and Charlie Dargie, / Old Skinny Davis and Jimmy Pan Quee, / Big-mouthed Charlie and old Paree, / The Tipperaray Pong and Jim Wilkie [...] Three whites, two Chows, four bucks and a gin.
1998		Stage (London) 24 Dec. 8/3: He is currently appearing as Pong the Chinese Policeman in Aladdin.

2. a Japanese person.

1958

D. Stivens Scholarly Mouse and other Tales 65: As he got closer, we saw he was too tall to be a Pong or an Eyetoe [...] It didn’t sound like English to us but more like Pong yabber or Eyetoe or Dago gibberish.