Definify.com

Webster 1913 Edition

Noun.

(Textile Manuf.)

A machine for applying size to warp yarns.

slasher ‎(plural slashers)

One who slashes.
A machine for applying size to warp yarns.
(informal, film) A horror movie with graphic blood and violence.
One who self-injures by cutting.
A tool for cutting undergrowth.
- 1992, Melvin R Lansky, Fathers who Fail
  […] an overdoser, binge drinker, slasher, or sexually impulsive person, is found to act impulsively following some sort of change in a relationship.

one who slashes

horror movie

a tool for cutting undergrowth