Green’s Dictionary of Slang

(UK black/drugs) cigarette containing a mix of cannabis/cocaine or cannabis/crack.

2018		Russ Millions ‘Gun Lean’ [Lyrics] Punk, I bet you still bump cabby (Slang).
2018-20		T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Cabby– cigarette containing cannabis and cocaine or cannabis and crack mix .