* The girls in ''Literature/TheBabySittersClub'' books often use outdated slang, as much of the series seems to be stuck in Ann Martin's own 1960s childhood. In one particularly cringe-worthy example, Claudia uses the phrase "What a hoot!" in a completely non-ironic manner. The girls also have a habit of inventing their own words to use in place of "cool," such as "dibble" to mean "incredible".
* The band in ''The Last Days'' use the word "fawesome". Over. And Over. And Over. And Over. And Over. It's not clear if the author knows that that its an abbreviation of 'fuck awesome'.
* Elinor M Brent-Dyer's ''Literature/ChaletSchool'' books from the '20s-'30s have American Chalet Girls using all kinds of weird and wonderful slang, such as "rubber-necked four-flusher", "glumph" and "splay-footed".
* In ''Literature/FearAndLoathingInLasVegas'', Raoul Duke picks up some of the literature available at the anti-drug conference and flips through it. He notes that none of what is described as "drug culture slang" is correct, specifically noting the use of the word "tea shades" for sunglasses.
* In Creator/HarryTurtledove's ''Literature/{{Timeline 191}}'' series, the majority of which is set between 1914 and 1945, we get an early 20th century version that could be considered a subtle parody: numerous characters comment on the word "swell" replacing "bully," and their difficulty adjusting. Turtledove is also fond of using the phrase "lick 'em" (It basically means "we'll kick their ass!"). It shows up in just about every time period his books are set in: 1880s, 1910s, 1940s, 2080s...
* In the ''Literature/LegendsOfDune'' prequels there are things called "Cymeks," apparently trying to combine "cyborg" and "mech" with a [[XtremeKoolLetterz Really Kool K]]. Cybernetic ''and'' mechanical, huh?
* Probably the oldest example here, Creator/PGWodehouse used a lot of slang from the 1890s in his works, probably intentionally. While a keen observer of human nature, playing with language was Wodehouse's priority and he tended to write characters as rather broad archetypes or even stereotypes. The anachronisms serve as a shorthand for each character type and tend not to detract from the overall sparkling dialogue. An example is his American characters, who are constantly, clumsily, forcing words like "gee" and "okay" into their speech.
* In the column "Dude, Read All About It," Creator/DaveBarry explains how newspapers have been trying to attract younger readers to boost their declining readership:
-->If you read your newspaper carefully, you'll notice that you're seeing fewer stories with uninviting, incomprehensible, newspaper-ese headlines like PANEL NIXES TRADE PACT, and more punchy, "with-it" headlines designed to appeal to today's young people, like PANEL NIXES TRADE PACT, DUDE.
* Subverted in Garth Nix's ''Literature/KeysToTheKingdom'', when the characters seem to use offbeat slang. If the reader pays attention, they realize the series is actually TwentyMinutesIntoTheFuture, and it's not confirmed that the characters are even speaking English.
* Creator/EEDocSmith's ''Literature/{{Lensman}}'' series is set at some point in the indeterminate future, where interstellar travel and communication is a relatively casual matter. While "Doc" Smith essentially created the 'SpaceOpera' genre, his characters use slang based on 1920s United States constructions, such as a male addressing a female as "toots". Of course, even if the 20s slang were missing, the [[ValuesDissonance mores and culture]] present in the books would still make the books wholly dated. There's also a fair amount of constructed slang, such as the substitution "QX" for "OK," and the constant use of the word "jets" for... personal ability and competence or something like that. This is all parodied hilariously in Creator/RandallGarrett's short story "Backstage Lensmen", where the slang gets so thick that even the characters don't understand what they are talking about.\\
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Much of the communication in the series is done telepathically using [[AppliedPhlebotinum the Lenses]], which can be used to talk to everything from humans to StarfishAliens. The author's use of 1920s-era slang may be a translation convention, intended to represent to the reader the way that Kinnison's thoughts sound ''inside his own head''. It still sounds really weird, and it contributes to the {{zeerust}} atmosphere of the series.
* The Literature/{{Animorphs}}
** The series usually steers clear of Totally Radical by just not having their characters use slang. For a period lasting 2 or 3 books, however, they tried to introduce "honkin'" as a slang term. It didn't stick.
** A less ambiguous example would be when Cassie worried that her mother, who was supposed to make a speech in front of her class, would embarrass her by trying to namedrop bands like "Boyz Eleven Men, Snoopy Doggy Dog, and Nice Is Neat". Rachel manages to translate the first two, but needs Cassie to explain where the crap she got "Nice Is Neat"; it turns out that "Nice Is Neat" is how Cassie's been getting her mom to let her bring Nine Inch Nails albums into the house.
** Invoked by one of the characters. One comments that they'd "bet dollars to donuts" on something and another comments "Something your grandmother used to say?"
* Lampshaded in a Literature/{{Discworld}} footnote of a footnote describing the final test of the Monks of Cool:
-->"Yo[[labelnote:*]]Cool, but not necessarily up to date.[[/labelnote]], my son. Which of these is the most stylish thing to wear?" "Hey, whichever I select."
%%* ''Tattoo'' by Jennifer Lynn Barnes has this to a degree.
* ''Literature/DiaryOfAWimpyKid'' makes fun of this with Greg getting a book for Christmas titled [[TwoDecadesBehind "Math is Rad," with a picture on the front of a person with spiked hair and sunglasses]].
* ''Literature/IDidNOTGiveThatSpiderSuperhumanIntelligence'': Neon Rider speaks in heavy slang in a PeriodPiece set over thirty years before it was written.
--> ''[Y]our home is the funk. I don't dig your profession, but that rad pad almost makes it cool.''
* The novel ''Night Runner'' contains the line, "I'm the Master Chief and you just got powned."
* Scott Turow's ''Innocent'' (sequel to ''Presumed Innocent'') has the youngest character (28, compared to the main characters being in their 50s and 60s) talking in the most totally radical way, especially about how "completely tuned in" his girlfriend is.
* Creator/RobertBloch was rather prone to this in his short stories when he was sending up beats and hippies, making it more like Totally Hip, Daddy-O or Totally Groovy, Man.
* In ''Literature/TheDresdenFiles'':
** Harry briefly talks like this to the Red King, since his words are being translated into the language the Red Court uses (presumably an ancient Mayan dialect) and he decided to annoy that translator by choosing words that would be difficult to give any kind of reasonable definition for in ''English'' let alone in a language dead for hundreds of years.
** In a milder example, on one occasion he tells Michael "that's how I roll," much to Michael's amusement (given that by this point in the series Harry is pushing forty). Then it's {{lampshade|Hanging}}d when Harry claims he heard Molly (Michael's daughter and Harry's apprentice) use it, so "it must be cool."
* Exaggerated in a series of children's novels based on ''Comicbook/SonicTheComic'', where even the ''narration'' is done this way. ''Literature/SonicTheHedgehogInRobotniksLaboratory'' also included what one can only hope is a LampshadeHanging, as Sonic and Tails gently mock the monkeys of Emerald Hill for using "totally out of date" [[UsefulNotes/BritishAccents Cockney accents]]. From ''Literature/SonicTheHedgehogAndTheSiliconWarriors'';
-->''"A big ten-four to that, good buddy," said Tails. "We've gotta get hip and dig his crazy scene, find his pad, cash his chips and everything will be copacetic. It'll be very."''
* Bill O'Reilly's ''O'Reilly Factor For Kids'' is worse than it sounds. The lowest point is the periodical mock instant messaging sessions with the most outlandish acronyms. There is a handy little glossary in the back that explain to you what phrases such as "YYSSLIBTO" and "-6%" stand for ("Yeah yeah sure sure like I believe that one" and "Not very clever" respectively).
* Sidestepped by Anthony Buckridge in his ''Jennings'' series of school stories, by making up most of the schoolboys' slang, so it couldn't be "wrong" or dated.
* Averted in ''Literature/AClockworkOrange'': author Anthony Burgess, a professional linguist, actually thoroughly studied contemporary teenage slang, but then decided not to use it as he wanted his story to be set in an undecided point in the somewhat near future. The result is a special slang he invented named "Nadsat" (from Russian "-nadtsat", meaning "-teen"), which is English mixed with some rhyming slang, archaisms (intentionally using YeOldeButcheredeEnglishe), a few neologisms and borrowings, and lots and lots of Russian words (as it was The Cold War and Russian, which Burgess spoke, was very intimidating, hence suitable for gangsters).
* Arguably the most horrifying thing about ''Literature/TheLangoliers'' is the dialogue given to teenage girl Bethany Simms ("Totally tubular!").
* In ''Literature/RallyRoundTheFlagBoys'', Comfort Goodpasture speaks in what is described as "an execrable mishmash of teen-age patois." The narration sometimes imitates her habit of affixing "-sville" to adjectives and buzzwords.
%%* A combination of this and MostWritersAreAdults happens in ''Does My Head Look Big in This?'' by Randa Abdel-Fattah.
* Diesel, a loner from ''Literature/WarriorCats'', is the most obvious character in the series to speak like this. Heck, he even keeps calling Graystripe "bro"! Occasionally in the later books, too, a young cat will say "totally" or call something "cool", which sticks out when compared to the fairly formal speech that the Clans mostly use.
* The second ''Literature/WitchAndWizard'' book (''The Gift'') does this deliberately at one point - Whit likens the slangy talk of the guys asking about the illegal rock concert to camp counselors trying too hard to sound cool. It's these little details that make Whit suspect they are secretly [[ANaziByAnyOtherName New]] [[DayOfTheJackboot Order.]]
* In ''{{Literature/Reconstructing Amelia}}'' the actual teenagers mostly avoid this in their dialog and texts, which sound just about right for the time period (late 2013), but a popular (and unauthorized by the school) gossip blog called [=gRaCeFULLY=] is full of this. It turns out to be [[spoiler:a clue that the blog is run not by a student, but a teacher]]. And one character's ''avoiding'' this compared to the blog makes it significantly harder to tell they're actually an adult until TheReveal.
* ''Literature/OMGShakespeare'' turns Shakespearean plays into textspeak. This includes "YOLO" being used in ''2015'' and "FOMO" being used much more than it actually is.
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