Green’s Dictionary of Slang

bange n.

[dial. benge, to lounge, to laze about; note New Eng. dial. bange, to idle about, to take advantage of another’s hospitality]

(Aus.) a rest, a sleep.

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[Aus][A. Harris] (con. 1820s) Settlers & Convicts 193: Stray hands wandering back were already dropping in [...] for a few days’ ‘bange’ (rest).
[Aus]Bulletin (Sydney) 6 Oct. 32/1: He tucked his trousers into his socks to keep out the black ants as much as possible, and lay down for his mid-day ‘bange.’.