Green’s Dictionary of Slang

1. to reject, to throw away, to dismiss.

1941		Williamstown Chron. (Vic.) 15 Mar. 2/3: The Housing Commission has ‘diced’ the Greasy Point site.
1943		Sydney Morn. Herald 11 Dec. 7/3: When anything is discarded or thrown away it is ‘diced’.
1944		L. Glassop We Were the Rats 5: ‘What’s yer old woman call ya “Howard” for?’ ‘It’s me name, but it’s too cissy, so I dices it and picks up “Mick”.’.
1953		K. Tennant Joyful Condemned 214: I’ll dice it—for now.
1954		(con. 1940s) T.A.G. Hungerford Sowers of the Wind 254: That harpy I used to live with didn’t have any up to the time I diced her.
1963		(con. 1944) L. Glassop Rats in New Guinea 63: I’m going to dice my tin hat and two of my shirts.
1977		(con. 1941) R. Beilby Gunner 219: What duty? The army diced us, remember, down on that beach.
1998		Eble Campus Sl. Apr. 3: diced – laid off from a job: ‘When his company reorganized, everyone in his department got diced.’.

2. of a lover or friend, to abandon.

1944		L. Glassop We Were the Rats 169: I’m diced, Mick [...] or scrubbed or wiped, if you prefer ’em.
1957		D. Niland Call Me When the Cross Turns Over (1958) 174: They [...] went out to tell the world all about the Mate they diced.