Green’s Dictionary of Slang

cube n.1

also cubes
[shape]

1. (US tramp, also cubicles, risk cubes) in pl., dice.

[UK]G. Colman Spleen I i: I would fain have been among the red ribbands and black legs at Hell in the evening, and tried my luck with tossing the cubes about.
[US]C.E. Piesbergen Overseas with an Aero Squadron 56: ‘Money-wild’ has the cubes.
[US]H. Wiley Wildcat 143: Gallopin’ a couple o’ risk cubes wheneveh I craves action.
[US]H.L. Wilson Professor How Could You! 338: We had some lively bouts with the hazardous cubes.
[US]W. Winchell On Broadway 18 Feb. [synd. col.] The other night Wingy lost back the last few hunded dollars, trying to woo the cubes again.
[US]G.H. Bean Yankee Auctioneer 122: The man handling the dice [...] must have had a lot of experience throwing the cubes.
[UK]R. Frede Entry E (1961) 59: The great Bogard is gonna deign to wager on the cubes with us.
[US]‘Tom Pendleton’ Iron Orchard (1967) 67: I never seen such a run of luck. Them cubes was really listenin’ to me that night.
[US]H. Sackler Great White Hope I iii: Ole Doctuh Wishbone gwine ta roll dem cubicles.

2. (drugs) morphine, esp. 1oz (28g) (or what is sold as 1oz) of morphine [the shape of bulk supplies].

[US]G. Bronson-Howard God’s Man 39: We used to get seventy-five cents for a hundred cubes of the unrefined, ninety-five for the same in pressed hypo tablets, half-grains, that is.
[US]M. West Babe Gordon (1934) 183: There’s four two-and-a-half-grain cubes of morphine in there.
[US]Monteleone Criminal Sl. (rev. edn).
[US]Murtagh & Harris Who Live In Shadow (1960) 69: They dilute them [morphine and heroin] and package them in capsules, paper packets, pills or cubes.
[US]R. Giallombardo Gloss. in Study of a Women’s Prison 203: Cubes. Morphine tablets.
[US]E. Folb Runnin’ Down Some Lines 233: cubes Morphine, natural alkaloid of opium.
[US](con. 1920s) Courtwright & Des Jarlais Addicts Who Survived 184: All right, what does she want? Cubes or ...
[US]ONDCP Street Terms 7: Cube — 1 ounce.

3. (US campus) in pl., the testicles.

[US]Baker et al. CUSS.

4. (drugs) LSD [early LSD doses were often dripped onto sugar cubes for easy ingestion].

[US]R.R. Lingeman Drugs from A to Z (1970).
[US]E.E. Landy Underground Dict. (1972).
[US]D.E. Miller Bk of Jargon 337: cubes: LSD soaked into sugar cubes.
[US]ONDCP Street Terms 7: Cube — LSD.

In compounds