Green’s Dictionary of Slang

(Aus.) an act of abuse; a (severe) critique.

1897		Tocsin (Melbourne) 9 Oct. 8/3: And this is supposed to be a cutting chuck-off at Protection.
1900		Pioneer (Yorketown, SA) : Firstly, you say, ‘Where is Edinburgh without Yorketown?’ I take this as a sarcastic ‘chuck off’ at Edinburgh because they did not have any elaborate preparations for the reception of His Excellency.
1913		letter in Brisbane Courier 9 Apr. 18/3: Mr Morris commences as usual with a ‘chuck off’ against Christianity.
1922		Worker (Brisbane) 16 Nov. 13/2: [They] have assailed Charlton’s remark — which, by the way, was put forward more as a chuck-off at the Tories’ low-wage cackle rather than as a cut-and-dried proposal to hack large hunks off Australia’s interest burden.
1923		Northern Star (Lismore, NSW) 22 Sept. 9/5: This is not a ‘chuck off’ at the girl golfer, to whom I take my hat off always with courtesy and humility.