a movie that is quite popular with grade-schoolers. You will usually be asked whether or not you have seen this movie, to which you must respond yes and then proceed to make up random scenes you saw in it. Otherwise, as the title suggests, you are gay.
person 1: Have you seen the movie Gay People Say No? *snicker*
person 2: In fact, yes I have. Do you remember the car chase scene where the hero jumps through the windshield, shoots the driver, crashes the car off the cliff, and jumps onto a helicopter at the last minute, steals it, and destroys an entire car dealership with it and then shoots at random people?
person 1: walks away