Green’s Dictionary of Slang

(drugs) amphetamine, methamphetamine.

1971		Illinois Legislative Investigating Committee Drug Crisis in Spears (1986).
1972		B. Rodgers Queens’ Vernacular 46: Christina (camp, fr narc sl crystal = methadrine) methamphetamine in powdered form.
1980		‘Gloss. of Drug Terms’ National Instit. Drug Abuse.
2001		ONDCP Street Terms 6: Christina — Amphetamine. [Ibid.] 7: Cris — Methamphetamine. [...] Cristina (Spanish) — Methamphetamine.
2003		K. Cage Gayle 62/1: Christina n. 1. methedrine [from crystal].