Do we have to have seen the movie? I know better than to watch them, but I would think that Kazaam (starring Shaquille O'Neil (sp?)) and that movie with Queen Latifah and Steve Martin (brain is protecting me by not remembering the name) would be about as bad as it can get.
Worst movie I've actually seen would be a tossup between Stop or my mom will shoot, Friday 2, and Weekend at bernie's 2. Saw a movie at like 4am on HBO once where a bunch of girls trapped in a building with a serial killer decided they needed to take a communal shower.. that was pretty bad, but at least had some redeeming qualities