A slasher film is a subgenre of horror movies that typically features a killer stalking and murdering a group of people, often in a graphic and violent manner. These films usually include a final girl, a character who survives the attacks and confronts the killer. Common themes include isolation, fear, and the consequences of moral transgressions. The genre gained popularity in the late 1970s and 1980s, with iconic films like Halloween and A Nightmare on Elm Street. Slasher films often employ suspenseful music and jump scares to heighten tension, making them a staple in horror cinema.