RhymeZone: brusher definitions

Definitions of brusher:

noun: Someone who brushes (any of the meanings).
noun: (mining, historical) A person employed to cut or blast the roof or floor of a roadway and so give more height.
noun: (mining, historical) A person who gets the mineral down by blasting in the working face after it has been "holed".

(Definitions from Wiktionary)