Oh, how I love movies that fall under the genre of "so-bad-it's-good." One I recently saw is called the Gingerdead Man, staring Gary Busey as a psychotic killer who is executed, brought back to life in the form of a Gingerbread cookie, and goes around killing people in a small bakery. One of the things I that makes me laugh most about this movie is the fact that there's a sequel, though I am still on the search to see it.
Some others that are absolutely must see films: Wild Zero, Tokyo Gore Police, Robogeisha, Machine Girl, Stacy, Zombie Women of Satan, Hard Rock Zombies, One Eyed Monster, Dead Snow