I Bought a Vampire Motorcycle (Dirk Campbell, 1990). Came to my attention because one of the writers (John Wolskel) went on to become a legendary audiodescriber for the blind (if only in my heart!), and when his movie was rereleased on DVD he wrote and narrated the description track. It has 876 IMDB ratings and gets a moderate amount of attention on b-movie blogs, but there was one scene, in particular, which appears to have, ah, lodged itself into the psyches of a certain niche segment of the British public. You can tell that two decades later he's still having fun with his dumb cheesy baby, his narration is filled with sentences like "a full moon gives way to a turd's-eye-view of Noddy's arse as he gets off the bog", and "Noddy gets hold of the turd and tries to pull it out of his mouth, its shitty unpleasantness squidging through his fingers."