Green’s Dictionary of Slang

christina n.

also cris, cristina
[SE crystal]

(drugs) amphetamine, methamphetamine.

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