Green’s Dictionary of Slang

bange v.

[bange n.]

(Aus.) to rest, to sleep.

[Aus]Bulletin (Sydney) 31 Jan. 11/3: Some people, however, are never satisfied, and we wouldn’t be at all surprised to find that our indignant friend, Mr. Smith, was the party who, when a fig fell into his mouth from a tree under which he was ‘bangeing,’ growled because ‘the dam thing didn’t come down chewed.’.