I love the movie Ice Pirates. It's a silly, campy, sometimes stupid 80s send-up of Science Fiction films that take themselves too seriously like Dune or the Mad Maxx movies. It stars Robert Urich, Mary Crosby, Ron Pearlman (without tons of latex on his face for once), Angelica Huston, and many others. It takes place in a future where feudalism and technology are hand in hand, and water is so rare it is used as a commodity. It jumps around from seedy space bars, to imperial war ships, to desert planets and is replete with weird aliens, robots, and many a swashed buckle. It is very clear that the cast had a ball making this movie, and despite the fact that it is riffing on movies that think too highly of themselves, Ice Pirates never falls into that trap. This is a B movie's B movie, and I love to love it.
(this trailer makes the movie seem a lot stupider than it really is, but it's the only one I could find.)