They probably didn't put Movie 43 on here, because the name of the list is "15 Worst FILMS of 2013," and Movie 43 clearly can't be considered a film of any sort. It's absolute garbage.

In fact, here's its Rotten Tomatoes page. I don't think I've ever seen a movie that's scored this low.

How is Movie 43 not on here… That film was DREADFUL in all aspects. Everyone knew it was going to tank, even before it came out. In fact, that movie is now on the certain "worst movies of all time" lists.