Come on, now, if you mention "Jaws III," you HAVE to mention "Jaws IV: The Revenge." LOL! "This time it's personal" the movie's tagline screeched. Riiiight. "Austin Powers'" ill-tempered mutant sea bass was more terrifying...
May I also submit before the FReeper committee "Superman IV: The Quest For Peace." Superman decides on his own due to a little boy's prodding to invade every nuclear-armed country and disarm them, presumably against their will, but no one ever says anything to him. Then throw in Gene Hackman in one of his worst-written and acted performances EVER and some mush-brained "supervillain" who is afraid of the dark or something...pure cinematic vomit. Oh, and there's a semi-evil rich, white guy as well.