Buck teeth were the dental stereotype common to most people of East Asian descent in the early and even mid 20th century.
In Eastern Asia, the bad teeth stereotype is heavily associated with Japanese people and either used to villainize Japanese people or Played for Laughs in Korean and Southeast Asian comedy. Much like Britain, Japan has lax standards on dental beauty and orthodontics is still a relatively recent thing. Crooked teeth are actually viewed as a positive trait in Japan with some Japanese women willing to spend thousands of dollars to have their teeth reshaped unevenly on purpose as it makes them look more childlike and thus "cuter".
Historically in Japan, white teeth were generally seen as unattractive, and women concerned about their physical attractiveness would artificially blacken their teeth as part of their makeup. Much American anti-Japanese WWII propaganda picked on the Japanese people's poor dental health, this stereotype eventually evolved into the Asian Buck-Teeth trope, which now instead of only targeting Japanese people conflates all Eastern Asian people into one monolithic bloc.
World War II depictions of the Japanese, however, typically involved giant upper front teeth and sometimes fangs. The primary inspiration for this trope was Hideki Tojo, the de facto leader of Imperial Japan during WWII, who had a pronounced overbite.
- Many depictions of Japanese in World War II U.S. comics had this feature. An example from SuperDickery.
- An old Archie comic drawn by Dan De Carlo had an example of this.
- All Asians in Mortadelo y Filemón, even in the latest releases.
- A non-Asian example is Prof. Bacterio. There is an episode in which Mortadelo burns up Bacterio's beard, revealing that he has enormous, very prominent buck teeth - which leads to think that Bacterio actually grows his beard in order to hide them.
- From the very first Tintin, the two Chinese torturers have teeth like this.
- Mitsuhirato, a villainous Japanese businessman in China, is drawn with stereotypically buck teeth, notable in a comic that was very progressive for its time in terms of racial attitudes (well, not counting the first book). Understandable in that at the time the character was written, Japan was currently engaged in a very brutal occupation of China, and Hergé made his views abundantly clear.
- A much more sympathetic Japanese policeman, Bunji Kuraki, does appear in a "The Crab With The Golden Claws", however, who is drawn normally.
- Lucky Luke: the Chinese launderer has teeth like this, as do many others. The leader of the Triads in Rantanplan's Heritage does not, however.
- Dan's cousin Chin-Kee from American Born Chinese looks like a bad Chinese stereotype, complete with buck teeth. He is drawn with this trait as part of his "embodiment of every negative Chinese stereotype ever." As part of his ongoing ruination of every relationship in Danny's life, the other kids start to think Danny's got buck teeth too. Turns out the reason he's so goofy-looking is because he's actually a badly made human disguise worn by Sun Wu Kong, the Monkey King.
- Detective Yashimoto, from Cybersix and his little sister have very prominent teeth, though apart from this they're not portrayed very stereotypically. Interestingly their character designs from the comic were kept for the Cult Classic animated series, despite the series being animated in Japan.
- In New Super-Man #16, Kenan has a vision of the past and finds himself in a 1940s Chinatown as it would have been portrayed in the comics of the day. He initially thinks the bald, bright yellow, buck-toothed people being beaten up by Slam Bradley are some kind of goblin, until All-Yang tells him to use his x-ray vision to see through "the illusion generated by a century of brutality", at which point they look like ordinary Chinese people.
- Mickey Rooney in his Yellowface portrayal of Mr. Yunioshi in Breakfast at Tiffany's has misaligned buck teeth.
- Once Upon a Time in China includes a bizarre Chinese example in the character of Buck-Teeth-Soo, the Americanized member of the cast. It's downplayed, though, compared to most of these examples.
- Comes up in some World War II era Three Stooges shorts, with the Japanese characters being played by actual Japanese Americans from internment camps, wearing fake teeth. Some of them were American citizens and some were native born American citizens. The teeth are particularly obvious in "The Yokes On Me," ( by today's standards probably the most racist of all the shorts) in which the actors not only were Japanese Americans from a camp, they PORTRAYED Japanese American escapees from a nearby camp bent on sabotage.
- Besides portraying many other Asians stereotypes, Ming Li-Foo from La Ballade des Dalton has huge front teeth◊.
- One character in the Wild Cards series was a joker whose virus-induced deformities made him a real-life version of a cartoon Asian, including big buck teeth.
- Along with many other Yellow Face aspects, this is part of Mr. Roboto's visage—three thin "pegs" between its leering lips accomplish this effect.
- Played for laughs in Ludacris and T-Pain's video ''One More Drink''. Offering to buy a sylphlike club crawler in a skirt a drink, only to decline once she smiles.
- Fire Emblem Awakening puts a fantastic spin on this, with Panne the Taguel (aka person with rabbit features that can turn into a literal Killer Rabbit) mentioning that humans seem more comfortable around her when she pretends to have buck teeth. Note that Panne seems to hail from the world's Europe analogue, though, rather than its Asia-analogue.
- Possible contributing factor to the racewank early in Homestuck fandom; John and Jade have buck teeth and are sometimes portrayed as Asian in fanworks. The artstyle is such that it's impossible to tell what, if any, race they were intended to be and since they were effectively cloned from nothing instead of being born, nothing says they actually have to fit into any recognizable racial category. The wank seems to have mostly died out by now, though.
- Krusty does it on The Simpsons when he goes back to stand-up comedy, showing how out-of-touch he is.
- In the old Disney short "Der Fuehrer's Face", the caricature of Hirohito looks like this. The Japanese soldiers in Disney's other wartime cartoons, such as "Commando Duck", are also drawn this way.
- Joe Jitsu from The Dick Tracy Show has buck teeth.
- Si and Am the two Siamese from Lady and the Tramp have buck teeth when their mouths are closed and Cute Little Fangs when their mouths are open. (Interestingly, however, their slitted eyes are blue, which is Truth in Television for actual Siamese cats.)
- In The Aristocats, Shun Gon the Siamese cat (a.k.a. the Chinese Cat) has buck teeth.
- Batfink: Batfink's Asian sidekick Karate initially had these. They were removed in later episodes though.
- Many early Looney Tunes shorts used this for Japanese and other East Asian stereotypes. Especially the war time cartoons Tokio Jokio, Bugs Bunny Nips the Nips and The Ducktators.
- Master Little in the animated The King and I movie has these, oddly for a movie that came out in 1999.
- This turned up in the Fleischer's Superman Cartoons episode "Japoteurs" with Superman foiling some bad Japanese stereotypes from sabotaging American War Effort.
- Charlie from Mr. Magoo has buck teeth.
- South Park :
- The kid Junichi in the "Jewbilee" episode has these.
- Cartman and Butters also use these when disguising themselves as Chinese people in "The China Probrem".
- The Family Guy episode "Road to the Multiverse" makes Quagmire in the universe where Japan won World War II and occupied the U.S. fall into this trope.
"Hello, I like many sex. Goodbye!"
- Peter sports buck teeth while wearing a Chinaman disguise in "Peter's Daughter"
- The Beatles' cartoon series fell into this trope whenever Japanese characters were featured, among the many other unfortunate stereotypes of the time.
- Ludwig Von Drake speaks with an Asian accent, complete with buck teeth, in the Wonderful World of Color specials "Three Tall Tales" and "Fly with Von Drake".
- Scooby-Doo, Where Are You!: Shaggy briefly gains buck teeth while disguised in "Mystery Mask Mix-Up".
- The promotional cartoons by Guido Manuli for Italy's "Bimbomix" music compilation series (which features Italo Disco and other popular music at the time) in The '80s includes the stereotypically Chinese and buck-toothed Cin Ciao Lin.
- Purno de Purno features an Asian Store-Owner named Dr. Ha Chiu who has buck teeth.
- Very common in World War II anti-Japanese Allied propaganda. Even Dr. Seuss got into the act◊.
- In his biography General Bill Slim mentions how he got hold of a picture of the Japanese general opposing him. He noted that Lieutenant General Kawabe looked like a propaganda caricature with his bullet head, thick glasses and buck teeth — so Slim comforted himself with the thought that, no matter which one of them was the better general, at least he was better looking.
- A lot of Roger Shimomura's artwork features Japanese caricatures that have either buck teeth or misaligned teeth, or at least have yellow skin like many of The Simpsons characters.
- The main character in Chibi Kiiro Jappu (Little Yellow Jap in English), a parody of The Story of Little Black Sambo, has two buck teeth sticking out of his mouth.
- The horse teeth variant actually existed with some Visual Kei artists until The New '10s or so, though it's a subversion - it wasn't due to their race or ethnicity at all, it was due to cosmetic dentistry (especially implant dentistry) not being half as advanced in The '90s and The Noughties, so an artist who was self-conscious over bad teeth had two choices very large, prominent, and somewhat obvious horse teeth or leaving uncared-for/discolored from tobacco or other drug use/otherwise undesirable teeth the way they were. Quite a few artists that had the money for cosmetic constructive dentistry often opted for the former, getting a result that, as technology improved, became very obvious.