[noun] [C] [informal]The passage describes the slasher (= person who damages or kills by using a knife) breaking into a house after midnight to find a girl asleep.(informal) A slasher book/movie is a book/film which contains a lot of violence esp. against women who are often seen having their throats cut.
SLASHER
Meaning of SLASHER in English
Cambridge English vocab. Кембриджский английский словарь. 2012