Green’s Dictionary of Slang

(Aus.) an Aborigine.

[1895		Truth (Sydney) 11 Aug. 3/5: ‘An Aboriginal Idyll’ / A most pathetic story, / About a nigger gory, / A murky aboriginal / Whose actions were vertiginal].
1941		Baker Popular Dict. Aus. Sl.
1955		N. Pulliam I Travelled a Lonely Land (1957) 236/1: murky – an abo.