The phrase used for one scene of the film is "The Living Dead at the Winchester Tavern" which Edgar Wright then points out as a reference to The Living Dead at the Manchester Morgue.
They make reference to The Simpsons episode: "Homer Badman" where during a list of people, the phrase can be read "If you are reading this, you are so sad" they mention this after saying that everyone should pause their dvds to read everything on a flip chart.