ah cabbage, n. — Green’s Dictionary of Slang

ah cabbage n.

[cod-Chinese name Ah + SE cabbage; many Chinese sold vegetables from a cart]

(Aus.) a nickname for a Chinese immigrant.

[1889		Dead Bird (Sydney) 21 Sept. 3/2: Ah Chin he sold his ‘cabbagee’ / To swell folks every day].
1900		Bulletin (Sydney) 17 Feb. 11/2: Ah Cabbage contrives even to carry a fair supply of grog in his vegetable cart now and again.