Green’s Dictionary of Slang

(US drugs) a form of injectable cocaine used in Hispanic communities.

1995		Reyes Ramos ‘An Ethnographic Study of Heroin Abuse by Mexican Americans in San Antonio, Texas’ on Texas Commission on Alcohol and Drug Abuse 🌐 ‘Appendix A: Gloss. of Tecato Argot’ Soda – cocaine.
1998		Austin American-Statesman (TX) 4 Oct. 9/4: Texas Prison Gang Slang [...] Soda: Cocaine.
2001		ONDCP Street Terms 20: Soda — Injectable cocaine.