Green’s Dictionary of Slang

(Aus.) dubious, unacceptable, underhand, unfair.

1900		Sydney Sportsman (Surry Hills, NSW) 14 Nov. 1/5: Those who were cognisant of the former being hookedy crookedy followed suit [...] planking their beans on Numidia.
1906		E. Dyson Fact’ry ’Ands 67: ‘Dead hookity, I call it,’ said the packer sympathetically. [Ibid.] 90: He’d bin [...] distributin’ Odgson’s cards in all sorts iv hookety shanties.
1908		Bulletin (Sydney) 30 July 14/2: ‘Goo’ day, Mucker!’ ‘’Day, Ponto! ’Ow y’ bumpin’?’ ‘Dead ’ookety, ole cock; feelin’ ’umpty-doo.’.
1911		E. Dyson ‘The Picnic’ in Benno and Some of the Push 9: ‘Get on to it, blokes,’ he cried in shrill tones. ‘Ain’t it dead hooketty?’.
1911		E. Dyson ‘Susie Gannon’s Young Man’ in Benno and Some of the Push 113: It’s dead hookety if a decent married woman’s t’ be [...] treated no better ‘n’ a Chow.