Reply #54: Absolutely, "Neighbors." That is the first film that came to mind. Catastrophe.

[Mike 03]

Here are some others, although I'm sure I'm missing some great ones.

1. The unfilmable script "Noble Rot" written in four (?) days by Belushi and father Guido Sarducci, so horrible that it almost made Michael Eisner jump out of a plane.
2. "Caddyshack" from beginning to end.
3. John Landis' segment of the "Twilight Zone" movie, which resulted in three deaths by decapitation.
4. Jack Nicholson's boondoggle, "Goin' South"
5. "Days of Thunder."

On Edit:

Probably that Chevy Chase, Dan Akroyd piece of shit "Spies like Us."

And, it wasn't a flop IMO, but critics panned it. To me, it's a classic: "The Blues Brothers."

For what it's worth, I attended a test screening of "Neighbors." It was incredible. They literally gave everyone a poster and a copy of the novel so that we'd fill out our opinion forms favorably, but the screening was a disaster.