My favorite movie parody was of the Dirty Dozen. Who can forget Jim Brown with his 32 showing through his uniform. In the end when Jim is shot and one of the soldiers in the truck says “those dirty Krauts they killed Jim. Lee Marvin responds those weren’t Krauts they were Cleveland Brown’s fans.
“2001: A Space Idiocy” (because it was so close to reality), and “Mission: Improbable”, in which the soda pop dispenser choices included “secret message.”