I’ve seen a number of the movies already mentioned in this thread. But Toys remains the stupidest movie I’ve ever seen. If nothing else, Toys is the worst movie ever made by people with genuine talent.
Agreed. I think it’s irresponsible to misinform people on important things like that.
One of the dumbest films I’ve ever seen was “Not Another Teen Movie”. It aimed to be a parody of the genre, but in the end based a large part of its jokes on base toilet and sexual humor.
Maybe it’s too obvious and on the nose, but I’m surprised no one has mentioned Tommy Wiseau’s ‘The Room’. It’s like a movie made by space aliens who watched a couple movies, but still have no idea exactly how language, emotions, story lines or basic human interactions work.
The first half of Toys is great and innovative. The second half of Toys is horrific and waaaaaaay too long. Basically, once you get to the “music video” scene you can turn off the film.
Richard Widmark as a prospective adoptive daddy is so miscast and cringe-y - this movie creeps me out when it shows up on TCM. You need some good-intentioned bumbling boob, like Jack Lemmon.
I think the other similarity is that the trucks had to keep some humans alive so they could pump gas. I think I read this story in the collection Night Shift while working graveyard at a gas station in my teens.
Beg to differ. I’ve seen hundreds of movies older than that, from the '20s, '30s and '40s, that in no way were stupid or lame. Its age is no excuse for its stupidity.
It wasn’t Tolkien. It was Avedis Zildjian.
Unknown World is certainly up there: think of it as The Core, but with worse science.
Most notably, one of the financial backers says, “Isn’t the center of the Earth a mass of molten metal?” And the scientist says, "People think that, but we scientists know . . . "

I agree with the Double Jeopardy, Lucy and White House Down examples listed above, and to make matters worse, all three of those were movies that took themselves quite seriously.
I won’t dispute White House Down being put on a list of stupidest movies ever, but I didn’t think it took itself all that seriously. Olympus Has Fallen, the other movie that year where terrorists invade the White House and take the President hostage and it’s up to One Brave Cop who’s accidentally trapped in the building with them to Die Hard the bad guys, was definitely an overly-self-serious, Sturm und Drang action “thriller”. I thought “White House Down” was pretty clearly and explicitly an action-comedy. Not a good one, mind you, but I thought it was trying to be fun.

i know several people here will disagree with me, but I thought the premise of Pacific Rim was too stupid for words. I still don’t think I’ve seen the whole movie.
I absolutely agree that the premise was stupid. The whole movie was stupid. Here’s the key point: it seemed like everyone involved realized that, and were just having fun. That movie is, for me, the type-specimen of a big, dumb, fun movie. The sequel, though, was both stupid and just kind of boring.
Strange Wilderness
Idiotic the whole way through. Also, the “Shark Clip” is literally the ONLY time I laughed the entire movie, which is supposedly a comedy. Here’s that part for free so you can skip the rest: (warning: profanity)
I submit there’s a BIG difference between marrying a man who’s old enough to be your father (but still looks relatively young) and banging one who’s old enough to be your grandfather.(and totally looks it).
I had 30-ish girlfriends when I was 54. I might have some at 69 if I start practicing black magic right away.

Most notably, one of the financial backers says, “Isn’t the center of the Earth a mass of molten metal?” And the scientist says, "People think that, but we scientists know . . . "
if the sentence finishes “…that the pressure keeps it solid.” they’re not wrong.
Which reminds me - 2012, with its “The neutrinos are mutating” scene. Only Dara really does it justice:
“Disaster Movie” - 2009 It may be the most ridiculous movie I’ve ever seen.
At least the title didn’t lie, the movie was a disaster!!
All the Will Farrell movies bit the big hairy wazoo. Honestly, he must be able to tie a knot with string with his tongue to keep getting movies with him made.
There are hundreds of other Really bad movies; a lot of the Ben Gazara movies… the original (1976) “Assault on Precinct 13”… so many stinkers, so little time…
A more or less random sample of stupid movies I have known:
Flaxy Martin (1949)
Moronic mob lawyer Zachary Scott (who would’ve been awesome as Sinestro) pleads guilty to a murder he didn’t commit because he thinks he’ll get off. He doesn’t.
The Killer is Loose (1956)
What can you say about a movie where Mrs. Olsen is the only intelligent character? More Folgers?
Hell’s Belles (1969)
Big, dumb motorcycle racer has his bike stolen, so he throws rocks and does other annoying things to get it back.
Ghost in the Machine (1993)
Serial killer with phone book fetish has his consciousness transferred into cyberspace after an MRI mishap, allowing him to menace others via control of electricity. Parts of this excessively dumb movie play like parody…but they’re not.
Cat’s Eye (1997)
Live action, anime-based lameness features an inordinate amount of senseless and senselessly-edited action (i.e., even worse than M. Bay).
Mission to Mars (2000)
Intelligent design propaganda automatically qualifies under any credible definition of “stupid.”
Red Planet (2000)
Dudes are stranded on Mars, discover oxygen and are picked off by their CG-robot that’s inconveniently stuck in "predator mode.” Words fail.
Supernova (2000)
I have successfully repressed most of this, but I do recall Lou “Rhinestone” Phillips getting naked to mind-meld with 9th dimensional matter. It is interesting to note that this, Red Planet and Mission to Mars were all released the same year. 2000 was a great year for horrifically stupid sci-fi movies.

Unknown World is certainly up there…
As far as I’m concerned, no movie with a cyclotram can be considered all-stupid. If more films had cyclotrams, there would be fewer stupid movies.
Don’t forget about “Lavalantula” or the whole “Sharknado” series, although those were deliberately silly.
I will have to vote for Blank Man and Sister Act II. I paid to see both in theatres and both were disappointing.
The Wayans Brothers did Coming to America and I’m Going to Get You Sucker, both of which I found hilarious. Blank Man, also made by the Wayans Brothers, is like that, but without any sort of humor. The first Sister Act movie had me in stitches. The second had me yawning. IIRC the only funny thing about the latter movie was a “log” of extremely hard bread.
There were some near misses. I watched the first Ace Venture movie but fortunately saw reviews of the second before I saw the second one. Glad I missed that.
I wholeheartedly agree about Volcano and The Core, but I have to throw in Armageddon. The only reason I’ve seen those three is that I’m married to a crazy person who apparently has no taste in movies. That and he’ll deliberately stop on movies like these to annoy me. I swear, sometimes I hurt myself by suppressing the snark…
There’s something about a really awful movie premise that still takes itself seriously.