I think it's great - two blokes standing up and having a blue.
Les Boyd on the Gorden Tallis-Ben Ross fight, Sydney Morning Herald, 22 March 2002
Blue is Australian for a fight.
Other terms are "bit of biff", or "go the biff", "bit of a bingle", or "go the knuckle".
Bluey has traditionally been the name for a redhead, but that usage is declining.
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