Green’s Dictionary of Slang

1. (drugs) LSD.

1968		N. von Hoffman We are the People Our Parents Warned Us Against 49: I’ve got blue dots I’m selling for $1.75.
1981		D.E. Miller Bk of Jargon 337: dots: LSD microdots.
2001		ONDCP Street Terms 8: Dots — LSD.

2. (UK black) small, saleable quantities of crack cocaine or marijuana.

2012		Skepta ‘Ace Hood Flow’ 🎵 Riding around on a bike / Blade long enough to go to jail for, more dots on me than a dice.
2015		67 ‘Skengs’ 🎵 I break down packs into dots then replace them dots into gwuap.