Here's a comprehensive summary of the "Scary Movie" Wikipedia article:
Scary Movie is a 2000 American comedy horror parody film directed by Keenen Ivory Wayans and co-written by Marlon and Shawn Wayans. It cleverly spoofs the slasher and mystery genres, primarily lampooning the plots of Scream and I Know What You Did Last Summer. The story follows a group of teenagers who, a year after accidentally killing a man and dumping his body, become targets of a Ghostface-masked killer.
Beyond its main parodies, the film also humorously references other iconic movies and TV shows such as Halloween, The Shining, The Matrix, and The Blair Witch Project. Released by Dimension Films on July 7, 2000, Scary Movie became a massive commercial success, grossing $278 million worldwide against a $19 million budget and becoming the highest-grossing film in the series. Despite receiving mixed reviews from critics, its popularity led to four sequels, starting with Scary Movie 2 in 2001, cementing its place as a notable entry in the horror-comedy genre.