Green’s Dictionary of Slang

(Aus.) to act in a particularly cowardly and treacherous manner, to exhibit the mannerisms of the dingo, the native Aus. dog, a despised creature.

1925		Sydney Sportsman (Surry Hills, NSW) 23 June 6/3: Bill dingoed it in the race, however, and once more proved that unless he ran have matters the way the doctor ordered, he’s not worth the proverbial bob.
1930		Eve. News (Rockhampton, Qld) 7 Apr. 8/3: There is a suggestion that some of the boys ‘dingoed’ on their comrades. I don’t know if there is anything to this.
1940		Truth (Brisbane) 1 Sept. 2/3: Dingoed On It. If Sir Corban ever sits up and barks like a dog, it won't come as a surprise to the many who backed the Corban gelding to hot favoritism in yesterday's Purse [...] He revealed real canine instincts in shirking the issue from the half-mile.
1952		J. Cleary Sundowners 194: I don’t think he’s dingoing the race.
1954		(con. 1940s) T.A.G. Hungerford Sowers of the Wind 154: Linden with out a word [...] took his leave of James. [...] ‘Dingoed it!’ Stewart muttered succinctly.
1955		N. Pulliam I Travelled a Lonely Land (1957) 232/2: dingo on – to ‘rat’ on a person.
1968		S. Gore Holy Smoke 54: He tells them [...] what sort of a standover merchant his God could turn out when a bloke tries to dingo on him.
1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 ‘To dingo it’ is to avoid confrontation.