I haven't seen Dumb and Dumberer, but I enjoyed Dumb and Dumber for what it was worth
Not many films are coming to mind as being officially Stupid. Perhaps the best example I can think of right now is the sequel to XXX.
XXX was an acceptable enough action movie. The fact that there was a sequel made when the original actor, Vin Diesel, refused to play the lead again, seemed like a very good reason to Not make the sequel. The movie itself was even worse than this fact. It lost so much when the original actor didn't return, and the film didn't have enough redeeming qualities to make up for it.
I thought of this only because I watched XXX at a friends' house this weekend
