Green’s Dictionary of Slang

chuck it! excl.

stop it!

1891		Bird o’ Freedom (Sydney) 7 Feb. 3/3: ‘Wot’s that you say? Here! Chuck it, Yer won't get me on that.
1894		E.W. Rogers [perf. Marie Lloyd] The Barmaid 🎵 ‘Here chuck it, Billy, that’s too thick / You talk like that she’ll out you quick’.
1906		E. Pugh Spoilers 150: ‘Some three months ago you did me the honour –’ ‘Chuck it!’ ‘– the honour of accepting a certain proposal of marriage.’.
1906		Sun. Times (Perth) 1 July 4/7: A lumper from the Fremantle wharf [...] cried ‘Chuck it’.
1914		‘Ian Hay’ Lighter Side of School Life 118: Ashley minor, chuck it!
1928		R. Hall Well of Loneliness (1976) 48: ‘Oh, chuck it!’ growled Roger.
1939		(con. 1880–90s) S. O’Casey I Knock at the Door 77: Oh, chuck it, Johnny, chuck it, boy.
1945		(con. 1937) R. Westerby Mad in Pursuit 147: ’Ere, chuck it, Guv [...] Go easy.
1961		‘Frank Richards’ Billy Bunter at Butlins 55: Just chuck it, see?
1999		Guardian 2 Nov. 18: Influential? Chuck it, Sacks.

In phrases

chuck it up!

stop it!

1885

Bulletin (Sydney) 11 Jul. 4/3: Oh! chuck it up, and give the Muse a rest, / You howling dervishes of screedy song, – / Give up the dactyl! and the anapæst! / Betake ye to the place where ye belong.