Flash Gordon. The 1980’s version. On the jungle moon of Arboria. Two beautiful men, Sam Jones and Tim Dalton, contest for virile male supremacy - how? Not by fighting, in the approved SF manner, with guns or even swords, but by taking turns to thrust their arms up to the sockets in a multiply-orificed and extremely organic tree stump, hidden within which dwells a nasty green slimy stabby throbbing poisonous thing, the agonising sting of which sends a man mad. Go on, stick it in - it won’t bite. Oh, wait, it will. Subtext - what subtext?
The close runner-up is The Lion King: once you’ve got the words “vagina dentata” into your head, it’s impossible to hear “Hakuna Matata” any other way…
Well, there was a moment in Carpenter’s The Thing that might’ve counted… (spoiler box for the squeamish)
One character goes into cardiac arrest, and another pulls out the paddles. When he attempts to shock the guy, the chest opens up vertically with sharp teeth along either side of the split and severs his hands above the wrists.
Star Wars: The Empire Strikes Back, in which, under the gaze of a beautiful woman in hot bondage gear, Luke and Han prepare to be fed to an enormous vagina dentata
and
The Pirates of the Caribbean: Dead Man’s Chest, in which one rises up out of the ocean to devour the ambiguously gay Jack Sparrow, who has made the mistake of becoming romantically interested in a lady.
There was a Roger Corman film from the 1980s. I don’t recall the title, but it features a combat between two alien creatures. You don’t have to squint very hard to see one of them as a giant phallus and the other as a very toothy vagina entata. I can’t believe Corman got away with that one.
He liked the footage so much that, years later, he used it under the opening credits of his first remake (the Traci Lords one) of Not of This Earth.
There’s a truly bizarre French film called (in the American Version) Femmes Fatales (The original French title is Calmos : Femmes Fatales (1976) - IMDb ) that features some unbelievably bizarre sexual imagery. At the end, the two heros (pretty loosely speaking) and up in a giant vagina. Toothless, though.
In a “clay animation” short called, I think, The Sex Shop, an alien doll (with a bifurcated phallus) turns a Ken Doll into a giany vagina with a ray gun. No teeth, again.
Finally, did anyone besides me think of that giany vertically-opening mouth (at least on the outside) of the alien in Predator and its sequels as a toothed vagina?
There’s that scene in Jackson’s King Kong, where the remaining band of men are set upon by a ridiculous panoply of nasty creatures and it looks like they’re dead, dead, dead. One of the creatures is a penis and vagina dentata in one - a thick, wormy beast arises from the muck, and a loose sheath of skin at its tip pulls back to reveal a toothy orifice. I think Pete has some issues.
Blood Diner, a parody of H.G. Lewis’s Blood Feast, in which two guys run a diner & hack up various women to piece together an ancient pagan demon-goddess. As she arises, I believe a big VagDent opens in her stomach & eats one of the guys’ head.
The animated flowers “fighting” in Pink Floyd’s The Wall.
I would suggest there are vagina dentata subtexts within “Jaws” for much the same reasons as outlined for the previously mentioned Flash Gordon scenes.
For those that haven’t seen it: [spoiler]One of the characters goes to see a film in which a man shrinks due to the experiments of his scientist girlfriend. He continues to shrink, and although his girlfriend searches frantically for a cure, he seems doomed. Smaller than doll-sized, he enters the girl’s vagina while she sleeps, and never comes out.
My parents had watched this film and soon after mom made baked potatoes for dinner, and added tuna and cheese. She enjoyed presenting my father with “a tuna potato”.