The Farrelly Brothers, Peter and Bobby, should thank their lucky stars that Nicolas Cage's incredibly bad "Left Behind" has already been released. Otherwise "Dumb and Dumber To" would be the leading candidate for worst movie of the  year. It's stupid --- not funny --- and contains so much revolting bathroom humor that Adam Sandler would be envious.


Given the Farrellys track record --- "Fever Pitch", "There's Something About Mary" and the under-rated "The Three Stooges" --- the abject failure of "Dumb and Dumber To" is as disappointing as it is head-scratching.


Twenty years have passed since their original "Dumb and Dumber" tickled audiences' funny bones. I recall that film did produce a lot of laughs, maybe because it was a more innocent time in America. Or maybe the inane behavior of its stars was a novelty we hadn't seen before.


For a lot of reasons, this sequel should be an embarrassment to all involved. Returning, of course, are Jim Carrey as Lloyd Christmas ("Like the tree, not the holiday") and Jeff Daniels as Harry Dunne. Both characters are equally dim-witted, but where they were actually likeable in the first film, here they are just gross and mean spirited.


The most egregious scene --- and there are many to choose from --- has a cat devouring a number of beautiful macaws owned by their former neighbor, a young blind man who is wheelchair-bound. We don't actually witness the feline's mayhem, only the aftermath of bloody dead carcasses and the cat blowing a few feathers out its butt hole. This constitutes fun at the movies?


In brief, the main storyline has Harry telling Lloyd he has a failing kidney and desperately needs a transplant. The boys, despite being almost total morons, are smart enough to realize that the best potential donor would be a family member, and when Harry learns he may be the father of a child some 20 years earlier, they take off in hot pursuit, thinking the child would be ready and willing to part with a vital organ.


This leads them to the child's mother, Fraida Felcher (Kathleen Turner), but she admits to numerous sexual encounters, so the identity of the real father is unclear. The trail leads to the step family where the child grew up ---  a daughter named Penny (Rachel Melvin), who is as dumb as a box of rocks. There are more inanities involving a death plot, an invention worth a billion dollars, twin brothers (Rob Riggle) with nefarious motives, a nursing home scene that is cringe-inducing --- and so much less.


Having a kidney transplant would have been more fun than this film. I can't take credit for that line. It was uttered by a young man in the crowd as we exited the theater, although, inexplicably, many in the screening audience found the movie sufficiently amusing.


The chief writing discredit for this mess goes to Sean Anders, which is curious in that he has had a couple of undeniably funny hits ("There's Something About Mary", "We're The Millers"). But he also has at least one dud under his belt ("Hot Tub Time Machine").


Comedy sequels tend to not live up to the success of the originals ("The Hangover 2 and 3" were mere shells of the hilarious first entry). So now we have Anders, the writer/director of the upcoming "Horrible Bosses 2". Stay tuned.


Opinion: Huge Don't Bother!