A friend or mate
A person who maintains railway lines.
Someone who fiddles or tinkers with things.
An ostler; one who looks after the horses in a mine.
Someone whose job is to sand and grind small imperfections from metal and ceramic castings.
A friend, buddy, mate, cobber; someone to hang around with.
An informal term of address, often used ironically in a hostile way.
Be friends with, hang around with.