Green’s Dictionary of Slang

(Aus.) a powerful, determined rush, e.g. of a crowd towards a bookmaker, shoppers to a sale or a footballer towards goal; often in context of boxing/wrestling, of a move that is enthusiastic, but unskilled.

1904		Truth (Brisbane) 29 May 7/5: The corned-beef rush to get on this good thing as soon as the books opened was an eye opener.
1909		‘A “Push” Story’ in Port Pirie Recorder (SA) 8 Sept. 4/2: Prodder jolted one Hop on th’ jaw, tripped up th’ other, ’n’ sprung t’r th’ street. Then the ole blanky school put in a corned-beef rush.
1914		Westralian Worker (Perth) 5 June 11/6: . Chris Ewing was a con tinual menace to the oposition, his corn beef rushes being very disconcerting; but where, oh where, did he buy his shooting boots?
1919		Land (Sydney) 30 May 8/5: [W]hen election time comes around there will bo a regular ‘corn-beef rush’ on the part of candidates to get the selection endorsement of some party.
1934		C. Drew ‘The Unbeliever’ in Bulletin (Sydney) 13 June 50/4: [H]e made a cornbeef rush and unloosed a swing that would have knocked Slugger cold it it had landed. It didn’t land, of course .
1942		Telegraph (Brisbane) 13 May 5/6: One Valley firm opened at 7.30, and assistants were greeted with what the manager described as a ‘corn beef' rush. By 8.10 am many of the women's sections were closed and many customers were disappointed.