when you are telling a story about your life when suddenly you realize that it was derived from a show or movie. NOT YOUR OWN LIFE. usually occurs within a person who has "no life"
Brad: hey dude, one time i had a crush on this girl named mary and i was at her house on prom night and got my penis caught in my zipper while i was...wait...nevermind, that was from the movie "all about mary".
Chad: Wow Brad, havin a bad case of Movie Memory? You really need to get a life!