Green’s Dictionary of Slang

(Aus.) a derog. name for an Aborigine woman.

1943		Baker Popular Dict. Aus. Sl. (2nd edn).
1948		Mirror (Perth) 24 Jan. 12/6: These ‘Bitumen Blondes’ of the outback have followed the lead of the metropolitan beach nifties who sheath the sleek chassis in shirts and slacks. Two gins modelling the mode belonga Wongallo Station, north of Darlot.
1955		N. Pulliam I Travelled a Lonely Land (1957) 230/1: bitumen blonde – an aboriginal girl or woman.
1959		D. Niland Big Smoke 20: He saw a half-caste girl go down the yard [...] ‘Who’s the charcoal blonde?’ [...] ‘One of the housemaids here. Not bad. is she?’.
1980		B. Hornadge Aus. Slanguage 278: bitumen blonde: Aboriginal woman.
2003		McGill Reed Dict. of N.Z. Sl. 23: bitumen blonde A dark-skinned woman. From Australia mid C20.