Green’s Dictionary of Slang

(Aus.) a derog. term for a New Zealander.

1901		H. Lawson ‘The Never-Never Land’ in Roderick (1967–9) II 14: The ‘Flax-stick’ dreams of Maoriland, / While the seasons come and go.
1908		H. Lawson ‘The Blanky Papers’ in Roderick (1972) 786: So you’re a blanky Flax-stick, are yer, an’ yer think Australia’s only a dust hole compared with blanky Maoriland.