Green’s Dictionary of Slang

oh, my dear n.

beer.

1902		Bulletin (Sydney) 18 Jan. 16/3: A heavenly plan with a big charming mottle of O-my-dear sticking out of his sky-rocket.
1913		Sport (Adelaide) 22 Mar. 12/3: They Say [...] That Bert T has taken to delivering bread again. What’s the matter, Bert, not enough ‘Oh my dear’?
1923		Smith’s Wkly (Sydney) 11 Aug. 15/4: Presently we sights Em and the ape. They got two bottles of Oh My Dear.
1928		M.C. Sharpe Chicago May: Her Story in Hamilton (1952) 132: Oh, my dear – beer.
1944		Maurer & Baker ‘“Aus.” Rhyming Argot’ in AS XIX:3.
1951		Sydney Morn. Herald 1 Dec. see 1902 above.
1960		J. Franklyn Dict. of Rhy. Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1981		P. Wright Cockney Dialect and Sl. 99: Beer can also be [...] Oh, my dear!
2002		Pete’s Aussie Sl. Home Page 🌐 oh my dear: beer.