Green’s Dictionary of Slang

1. to hit.

1923		Australasian (Melbourne) 23 June 49/4: ‘What would you do if you had to live with and be beholden to a man whose very presence in the room made you squirm?’ [...] ‘Do? Why I’d—I’d dong him on the cruet!’.
1924		(con. WWI) A.G. Pretty Gloss. of Sl. [...] in the A.I.F. 1921–1924 (rev. t/s) n.p.: dong. To hit, to punch.
1931		Northern Times (Carnarvon, WA) 5 Feb. 4/6: When the Soudanese spotted him, he ‘donged’ him with his boot box.
1938		X. Herbert Capricornia (1939) 69: Don’t go upsettin’ your Ma or I’ll dong you one.
1938		Press (Canterbury) 2 Apr. 18: ‘To dong’ and ‘to knock cold’ are plain.
1944		L. Glassop We Were the Rats 193: It took guts to dong them two big M.Ps the night A Company stacked on a blue in Tel Aviv.
1951		D. Stivens Jimmy Brockett 205: ‘A man ought to dong you,’ I said. But I didn’t like hitting a man who wouldn’t give you a go for it.
1953		I. Hamilton Till Human Voices Wake Us 113: He picked up a piece of wood and donged him on the head.
1959		I. & P. Opie Lore and Lang. of Schoolchildren (1977) 216: Dong him on the dome.
1960		‘Nino Culotta’ Cop This Lot 40: Great joint this [...] Dong some galah an’ yer get a free beer.
1968		S. Gore Holy Smoke 14: Beat it, before I dong yer!
1973		(con. 1940s–60s) Hogbotel & ffuckes ‘The Bastard from the Bush’ in Snatches and Lays 82: Would you dong a bloody copper if you caught the cunt alone.
1988		McGill Dict. of Kiwi Sl. 38/1: dong to strike or punch, perhaps from the sound of the word; eg ‘If you don’t piss off quick smart, I’ll dong you one.’.
1996		J. Byrell Lairs, Urgers & Coat-Tuggers 104: Grafter hooked the bookie who replied by donging Grafter with his bag.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].

2. (US campus) to have sexual intercourse.

1999

Eble Campus Sl. Nov.