Green’s Dictionary of Slang

(drugs) amphetamine.

1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Len Reed. [sic] Amphetamines. Rhyming slang for speed.
1993		I. Welsh Trainspotting 134: Aye. Ah’m talkin a loaday shite. It’s the Lou Reed.
2000		J.J. Connolly Layer Cake 230: These guys are on a bonus, on Lou Reed as well.
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 111/1: lou n. speed sense 1.
2004		L. Redhead Peepshow [ebook] She pulled out a tiny plastic bag. ‘Bit of Louie before we go?’ Speed [Ibid.] I’ve got some Lou and some smoke.
2010		L. Redhead Thrill City [ebook] We always did a bit of coke or Louie to keep us awake for the shows.
2012		(con. 1980s) I. Welsh Skagboys 34: It’s actually a still, mild summer night and it’s the Lou Reed that’s spreadin the chills.