Green’s Dictionary of Slang

(orig. US) anything of high quality, esp. drugs; also attrib.

1973		P. Maas Serpico 114: [T]wo plainclothes candidates puffing a joint in front of him whispered, ‘Hey, this is real good shit’.
1975		Sepe & Telano Cop Team 19: [of information] ‘It looks like good shit, Louie.’.
1981		J. Ellroy Brown’s Requiem 39: You got some good shit for the Fat Dog?
1981		J. Elllroy Brown’s Requiem 144: Another joint came my way and I hit again. This time even deeper. It was good shit.
1992		P. Earley Hot House 331: ‘Hey, maybe I should get some juice [i.e. Thorazine],’ another guard joked. ‘It looks like good shit’.
1993		B. Moore Lex. of Cadet Lang. 170: good shit ‘great’ (as in Standard Australian), excellent; a term of praise.
2000		T. Udo Vatican Bloodbath 8: Now, how about one of you motherfuckers goes and gets us some of that good-shit wine they got downstairs and not some of this po’ nigga shit that y’all sittin’ here drinkin?
2010		A. Steinberg Running the Books 55: Negative developments were bad shit; positive were good shit.