ping-in-wing, n. — Green’s Dictionary of Slang

ping-in-wing n.

also ping-in-the-wing, ping-wing

(drugs) an injection of a narcotic.

1949		Monteleone Criminal Sl. (rev. edn).
1952		Lannoy & Masterson ‘Teen-age Hophead Jargon’ in AS XXVII:1 28: PING IN WING, phr. Injection in arm.
1971		E.E. Landy Underground Dict. (1972) 72: dump the ping in wing [...] Give up one’s plans for an injection.
2001		ONDCP Street Terms 17: Ping-in-wing — To inject a drug.