Green’s Dictionary of Slang

1. (drugs) cocaine; crack cocaine.

1989		(con. 1982–6) T. Williams Cocaine Kids (1990) 135: Scotty cocaine or crack: ‘I’m going to see Scotty’ means ‘I’m going to get some cocaine’.
1995		G. Small Ruthless 238: After all it is not one or two posse drug dealers who have become so enamoured of their [...] ‘Scotty’ (as in the famous Star Trek line, ‘beam me up, Scotty’) that they have neglected to sell it.
2001		ONDCP Street Terms 19: Scotty — Cocaine; crack; the high from crack.
2012		‘Dutch’ ? (Pronounced Que) [ebook] He had been a mechanic in his former life, but once Scottie got him, his occupation became crack.
2023		New York Rev. Bks 19 Jan. 🌐 Scotty—the chatty, seductive personification of the crack cocaine to which Darlene is addicted.

2. (US drugs) phencyclidine.

2016

F. Stuart ‘Dispatches from the Rap Wars’ in chicagomag.com 🌐 He had been drinking a lot of lean—a mix of codeine cough syrup and soda—and smoking Scotty, as folks in Chicago refer to PCP, and he was really messed up.