Green’s Dictionary of Slang

(Aus.) a euph. for bullshit n.; also as excl.; also as v.., to lie or fabricate.

1932		Chronicle (Adelaide) 10 Nov. 58/3: That a drover’s life has pleasures the townsfolk never know, / Is Just poetic fancy from the days of long ago, / And the chap who wrote that bulldust was dreaming whilst asleep.
1942		Riverina Recorder (Moulmein, NSW) 14 Nov. 2/4: It all sounds like ‘bulldust’ to us.
1947		T. Thursday ‘Billy the Kidder’ in Blue Ribbon Western Nov. 🌐 He hands me six pages of corral dust which I am supposed to memorize.
1952		T.A.G. Hungerford Ridge and River (1966) 34: ‘Essence of bulldust!’ the cook retorted.
1957		D. Niland Call Me When the Cross Turns Over (1958) 69: She looked at him like he was a seven-tongued liar, he said; just like he was a big heap of bulldust.
1965		D. Martin Hero of Too 345: Oh, bulldust!
1965		W. Dick Bunch of Ratbags 39: It was a lot of bull-dust I know, but it was a lot of necessary bull-dust. [Ibid.] 189: I should have known those bludgers were only bull-dustin’.
1967		F.J. Hardy in Great Aus. Lover Stories 58: He bull-dusted and yak-yaked while the ex-warder paid for the beer.
1977		in K. Gilbert Living Black 219: It’ll hold at least seventy ton of fish. That’s no bulldust; the Fisheries supplied it to ’em.
1985		B. Robinson Aussie Bull x: Some timid and unnecessarily polite people refer to it rather gently as ‘Bullsh’ or ‘Bull Dust’.
1988		McGill Dict. of Kiwi Sl. 22/2: bulldust nonsense or reaction to the serving up of such; polite version of ‘bullshit’; eg ‘I’m sorry, but you’re just talking absolute bulldust.’.
1993		T. Winton Lockie Leonard: Scumbuster (1995) 70: What was all this reprobates bull dust?
2000		Paul port-sparc list NetBSD Mailing Lists 11 Dec. 🌐 PS remember the power on self test of RAM is not worth a pinch of bulldust.
2003		McGill Reed Dict. of N.Z. Sl. [as cit. 1988].
2021		C. Hammer Opal Country 146: [H]is private holding company, Bulldust Investments.