Green’s Dictionary of Slang

shoney adj.

[? antecedent of shonky adj. (1)]

(Aus.) in a criminal manner.

[Aus]Truth (Melbourne) 21 Feb. 12/6: And, my oath, he do run shoney, / Goin’ of a rapid pace. / Soon they pots him for a sixer, / Doin of a burglary.