This Is Spinal Tap is a 1984 American rock music mockumentary comedy film written, scored by, and starring Rob Reiner, Christopher Guest, Michael McKean and Harry Shearer. The film portrays the fictional British heavy metal band Spinal Tap. Directed by Reiner, the movie satirizes the wild personal behavior and musical pretensions of hard rock and heavy metal bands, as well as the hagiographic tendencies of rock documentaries of the time. Wikipedia
Derek Smalls: Remember at Luton Palace we were talking about writing a rock musical based on the life of Jack the Ripper.
David St. Hubbins: Yeah!
David St. Hubbins: You're a naughty one...
Derek Smalls, David St. Hubbins: Saucy Jack...
David St. Hubbins: You're a haughty one, saucy Jack.