Slasher films are a subgenre of horror films which typically involve a violent psychopath murdering several victims. These villains often wield bladed tools. Although the term "slasher" is sometimes used colloquially as a generic term for any horror movie involving murder, analysts of the genre cite an established set of characteristics which allegedly set these films apart from other horror subgenres, such as splatter films and psychological horror films.

Slasher may refer to:

• Slasher (basketball), a style of play in basketball
• Slasher film, a subgenre of the horror film
• Slasher (tool), a scrub-clearing implement
• Slasher (2004 film), a 2004 documentary film
• Slasher (2007 film), a 2007 horror film
• Slasher (2016 TV Series), a 2016 horror-drama TV Series
• John Reis (born 1969), American musician, known by the pseudonym Slasher
• Los Angeles Slashers, a Slamball team