1915 C. J. Dennis (1916) 119 Chuck off, to chaff; to employ sarcasm.
1915 E. G. Pilling Diary 21 Jan. in (1933) 119 Everyone is eating my lollies. They chuck off when a parcel of lollies arrives, but none are lacking on the eating stakes.
1941 S. J. Baker 18 Chuck off at, to sneer at, chaff.