From crush + -er.
crusher (plural crushers)
- Someone or something that crushes.
- A machine designed to crush rocks.
- (slang) A policeman.
- 1977, John Le Carré, The Honourable Schoolboy, Folio Society 2010, p. 110:
- Back in the lobby he bought a copy of Time but didn't like the way the plain-clothes crushers' looked at him, and left.