Green’s Dictionary of Slang

blotter n.2

[var. on shotter n.]

(UK black) drug dealer.

[UK]Dizzee Rascal in Vice Mag. at Hyperdub.com 🌐 Blotters is just a different word for shotters, innit. Drug dealers. ‘Bust a shot’ can mean to shoot someone, but generally these days it means drug dealing.