Mon
The Salopian way of saying 'mate'. Short for monner. Also, a 'proper monner' is a stereotypical Salopian lad from the depths of Shropshire.
Q) 'Ow do, mon?

A) Sound mon.

Q) How do you do, mate?
A) Good, mate.

See John over there? He's a proper monner, him. Never left Baschurch his whole life.