When lying on the couch, bored out of my mind, drinking a beer, Dude Where's My Car? seems like a good way to spend an hour and a half.
COOL WORLD gets my vote. That's the first movie I remember seeing and hating. What a jumbled mess. Makes no sense whatsoever.
Also, need I add:
THE PHANTOM MENACE
Click on the link for a concise essay arguing why this movie sucks:
http://www.ruthlessreviews.com/movie...tommenace.html
....and, there's also CHICAGO (just because everyone loved it even though it's a blight on the musical genre and insult to all great Gene Kelly movies)
I'm sure I could go on but that's all I can think of for now.