Well, if this thread exists, better be full of these sorts of films:
Howard the Duck

If Howard the Duck is supposed to be funny, then I'm supposed to be funny. Howard, an anthropomorphic duck from Duck World, or DuckTales (woo!) or whatever, travels to our world for some inexplicable reason and becomes involved with Lea Thompson. And when I say involved, there's an entire scene of sexual tension that made me want to be sick. Nothing happens for a good sixty minutes, and then some demon comes to "destroy the world" or something. "Hilarity" ensues.
The Master of Disguise

Dana Carvey is a comedian from Saturday Night Live, and was apparently funny on it. Here, he repeats "turtle" in a "Turtle Club" for a good ten minutes. Apparently its funny. It isn't. Did I say this was produced by Happy Madison Productions?
The Love Guru

I don't get this film. I don't understand what Mike Myers was trying to do. With the Austin Powers movies (well, the first two or the first one depending on your preference), he crafted a brilliant satire of the James Bond movies, and the entire British spy genre. Here, Guru Maurice Pitka makes veiled references to Law and Order. Yes, its about as funny as Scary Movie 4. Scary Movie 3 is better.
Little Nicky

Popeye's Chicken is ****ing ****. Little Nicky stars Adam Sandler, as a mentally challenged son of the devil. He has leave hell to get his brothers back who plan on creating their on kingdom of hell, on Earth (yes, Hell on Earth). He is accompanied by Patricia Arquette and a talking dog.
Year One

If the character Jack Black plays in this film is truly one of our ancestors, then how did he breed? The same goes for Michael Cera. Basically, something happens in Black and Cera's village, so they go on an adventure, meeting figures from the bible along the way. And it's not funny.