Green’s Dictionary of Slang

(US drugs) heroin.

1967		J.B. Williams Narcotics and Hallucinogens.
1977		L. Young et al. Recreational Drugs.
1981		E. Bunker Little Boy Blue (1995) 283: I gotta get some bread for shiva tomorrow.
1990		S. Morgan Homeboy 57: Next to the highgrade chiva he dealt, La Barba was proudest of his lowrider.
1997		E. Little Another Day in Paradise 210: ‘You OK with us slamming while you moving?’ [...] ‘Chiva?’ ‘Yeah, man.’.
2000		Indep. on Sun. Reality 30 Apr. 14: The drug they were taking was black tar heroin, called chiva.
2019		D. Winslow Border [ebook] You could drink, you could smoke a little yerba, but you couldn’t do chiva because no one can trust a junkie and a junkie is useless in a fight.