Green’s Dictionary of Slang

Colonel Custer n.

[rhy.sl.; ult. US soldier George A Custer (1839–76)]
(Aus.)

1. a muster.

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[Aus]R. Aven-Bray Ridgey-Didge Oz Jack Lang 23: Colonel Custer Muster.

2. a duster.

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[Aus]R. Aven-Bray Ridgey-Didge Oz Jack Lang 23: Colonel Custer [...] duster.