Drug addict slang

Primary road (motorway) of England. Runs from Leeds and London, except on Friday afternoons, when it becomes the largest car park in England.

A first degree murder charge (hence the name M-one, dummies!)

A generic military term.

Thats not completely true.

M1 was just a designation!
ever heard of the M1 thompson??
M1 bazooka?
(...235629 other examples..)

rapper from the group Dead Prez

Also a shotgun

and tank
and bazooka
and rifle