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 elements include suspenseful music, jump scares, and a focus on the killer's backstory. The genre gained popularity in the late 1970s and 1980s, with iconic films like Halloween and A Nightmare on Elm Street. Slasher films often explore themes of morality, fear, and the consequences of reckless behavior, making them both thrilling and thought-provoking for audiences.