Green’s Dictionary of Slang

mains, the n.

(UK Black) the main road.

150 ‘4 Door Truck’ 🎵 Get blammed on the mains in the face, my niggas trynna take off hats.
67 ‘Every Year’ 🎵 Don got left on the mains / Like don got hit by a bus.
[UK]T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Hit up the mains - go to urban zones.
[UK]Headie One ‘Both’ 🎵 Me and T Buck see two opps on the mains.

In phrases