slasher
noun
1
a person who takes a perverse pleasure from vandalism by slashing US, 1954.
2
in prison, a self-mutilator UK, 1996.
3
a surgeon. Often teamed with anaesthetists as 'GASSERS and slashers' UK, 2002.
4
in greyhound racing, a dog that cuts to the inside rail after the first turn US, 1997