brusher

Short definition from Wiktionary

Noun

1. 1
   Someone who brushes (any of the meanings).
2. 2
   A person employed to cut or blast the roof or floor of a roadway and so give more height.
3. 3
   A person who gets the mineral down by blasting in the working face after it has been "holed".
4. 4
   An online seller who uses the fraudulent technique of brushing.