For me, I would have to say Biodome, any movie with the words "Addams Family" in the title, Batman & Robin, and Coyote Ugly.
1. After about a half-hour through Biodome, I ejected the tape from the VCR and marched it right back to the video store like a mother grabbing a child by the ear for being a bad boy.
2. The original Addams Family tv series was a hoot. I suppose if you haven't seen it, then the Addams Family movies wouldn't seem so bad. But in comparison to the original, they seem like a really bad Chinese knock-off.
3. Batman & Robin, I lasted about 5 minutes, which is kind of like sleeping with a bad hooker. "I'm Batman." Really? I thought you were the Penguin!
4. Coyote Ugly. Dancing women on the bar, lighting the bar on fire, wasting good liquor all over the place. I don't even know what the show is supposed to be about, the bar scene was so over-the-top that I couldn't bear to watch any more.