The Honeymoon Killers. There's something wonderfully deadening about this movie. I laugh through the whole thing. It's ill in so many ways -- and the terrible acting is fabulous!
Sisters is also a phenomenally bad movie. The best thing is Margo Kidder's atrocious acting and accent, but the whole movie is fun. It's just idiotic. Hard to believe it's a Brian de Palma movie.
Obviously, Pink Flamingos has to be on any good, weird movie list. I love everything about this movie.
And I'm compelled to include Barbarella on my list, even though I find it irritating while I'm enjoying it. It's so bad you can't believe someone made it.
This list is a work in progress. Any suggestions from the peanut gallery?