"Shriek If You Know What I Did Last Friday the 13th" is a 2000 American direct-to-video parody slasher film. It spoofs several popular teen horror films from the 1990s, particularly "Scream" and "I Know What You Did Last Summer," as well as other horror classics like "Friday the 13th," "Halloween," and "A Nightmare on Elm Street." The movie humorously follows a group of high school students stalked by a bumbling masked killer with various comedic and absurd events throughout. It is known for its self-awareness, campy atmosphere, and a variety of parodic references to horror movie tropes and pop culture from that era.
If the phrase "shriek if you know what I did" is referenced in another context or if you meant something else by it, please clarify.