Gabe: This jackass just said that something can go "through a ferrocrete bunker like a neutrino through plasma." I get it, man. It says Star Wars on the cover. I know I'm reading about Star Wars. It's like, do they not have butter in space? Or hot knives to cut it with? Tycho: Listen, don't get your mynocks in a... sarlacc. —>—Penny Arcade, 2008-7-23
The author uses a popular and/or modern phrase in a work of Speculative Fiction, and adjusts it to the setting by replacing certain concepts with their more-or-less appropriate counterparts. Works as a sort of Shout Out to make the reader/viewer more at home in the world, while at the same time highlighting the difference; it can also be used to disguise swears. Can backfire if the adjustment comes off as too arbitrary (e.g., if the proverb refers to concepts that should exist in the speculative setting as well).
At times these are specific to an exact scene, too. The replacement concepts can be tailored to characters and current action, rather than being a common phrase of its own. A cop with an antagonistic relationship to his Imperial liaison can sardonically say the liaison's investigation team got past security like X-Wings go through a Death Star. In this way it can overlap with Remember When You Blew Up a Sun?, though it can refer to past moments anywhere on the spectrum of awesome and suck.
Related to Call a Rabbit a Smeerp and Future Slang inasmuch as they're all about creating immersion through language use. The difference is that Hold Your Hippogriffs is, for one, not about words but phrases; for another, Hold Your Hippogriffs doesn't always create new words, although it can. It's also related to Flintstone Theming, but with fewer puns.
Supertrope of Oh My Gods!. Not related to Call a Pegasus a "Hippogriff". The inverse of this, when a word is replaced due to never having the chance to exist, is Orphaned Etymology.
Justified in that horses and pigs may not exist in the world of Pokémon, though "Hold your Ponyta/Rapidash!" would have made more sense. Plus Horsea is a really small Pokémon, so eating one wouldn't be all that satisfying either.
Comics
This is especially ridiculous in the Marvel Apes comics; "a human's
monkey's
uncle" is an idiomatic phrase, except there are no humans in the Marvel Apes universe. Literally none. A few characters are mutated into human-like forms, but humanity is by and large nonexistent.
René Goscinny liked using this trope in his comics:
In Astérix, typical French curses involving God are transformed into those which involve Roman and Gaulish deities.
The fandom in general loves to swear to Arceus. Also an example of Oh My Gods!.
"FOR THE LOVE OF ARCEUS!
GOD!
"
The Legend of Zelda Fanfiction and Fancomics tend to substitute the words "God" or "Jesus" with either "Nayru", "Din" or "Farore", depending on which one is the most "fitting". Especially striking in the fan-flash series Unknown Origin, where Original Character "Biggs" would often shout "For Farore's sake!!" or "Oh my Din!!" whenever something weird happens to Link.
Considering that the whole franchise was a commentary about racism, you can't forget a line like "The only goodhuman
Indian
is a DEADhuman!
Indian!
"
Alexander manages to naturally do this, replacing phrases like "By God!" with "By Zeus!" or "In the name of the Gods!" instead of the singular, and other such things using ancient Greek-era things in place of more modern phrases and outbursts. A few times, it tends to get too clunky and usual, with things like "By Athena's Justice, this girl has spirit" that tend to be less artificial and more sticking out like a sore thumb.
At the climax of Oh, God! You Devil, when the Devil (George Burns) loses his nerve in a poker showdown with God (also George Burns), God comments, "I put the fear of me
God
into you."
Star Trek V: The Final Frontier Had Kirk mentioning "Moon over Rigel-7" as a potential campfire sing-along. When this movie was later riffed, Mike Nelson and Kevin Murphy mocked the use of this trope with such song titles as I Left My Heart On Tau Ceti Five and I Have Thirteen Eyes For You.
In The Integral Trees by Larry Niven, several characters use the expression "feed the tree," which means, "The words you are saying are a commonly used form of natural fertilizer."
The Trope Namer is Harry Potter; several of this expressions we hear from Mrs. Figg after she's revealed to be a Squib:
This also doesn't make sense, as in-universe, this is basically "Son of a football".
Bludger has also been used in other contexts as a generic curse. Since the purpose of Bludgers in Quidditch is basically to impede and harm the players, it makes a bit more sense used that way than "football" would.
"God rest ye, merry hippogriffs
gentlemen
" being sung by Sirius at Christmas in Order of the Phoenix. (This may very well have been Sirius messing with the words for his own sake, since he was attending on Buckbeak at the time.)
"Just yanking your wand.
leg.
"
"Get off his high hippogriff.
horse.
"
"Which came first, the phoenix
chicken
or the flame?
egg?
"
"You look like you've lost a Galleon
pound
and found a Knut
penny
."
In fact, in the Film, the band in one movie does a song pretty much entirely of this trope.
They also tend to refer to Merlin instead of God. Which makes sense, one supposes.
Rita Skeeter also once makes reference to a "bring and fly
buy
sale".
In the Discworld books, most of the examples of this trope are simply their setting-appropriate equivalents. E.G.:
A weird one that started out as a Nanny Ogg malapropism in Carpe Jugulum, and then somehow became the accepted version of the phrase in later books is: "The leopard does not change his shorts." In Unseen Academicals, this phrase's complete meaninglessness gets lampshaded.
Another common mangled saying is "the worm is on the other boot", a mash-up of "the worm has turned" and "the boot is on the other foot".
The tendency of Honest Johns in UK media to call everyone "squire" (CMOT Dibbler does this) gets extended to other Discworld cultures, with a camel merchant who calls Teppic "emir" in Pyramids, and Disembowel-Meself-Honorably calling Rincewind "shogun" in Interesting Times.
Klatch's role as the "generically foreign" country to Morporkians means we get "Excuse my Klatchian
A few aversions are lampshaded early on, when he notes that the use of the phrase "gypsies" is anomalous, given that there is no such thing as Egypt, but some words of place-name origin need to be kept for coherency's sake, so he's not calling them Djelibabes, as technically apropriate as that would be.
of time." Either because they're nocturnal (according to The Light Fantastic), or because they think we go through time backwards (according to Thud!, based on a line in Reaper Man).
The Star Wars Holiday Special is largely cringed over and ignored, but a few things have worked their way into canon. Boba Fett, Chewbacca's family, and Life Day.
Wedge: [after a very agreeable breakup, and having said that he hopes she'll still consider him a friend] "Meaning you can still call on me. Send me messages. Send me Life day
Christmas
presents."
"These guys◊ went through the estate's defenses easier than [[hottip: Rebels go through a Death Star: joke about cheap food of any kind / hot knife through butter]]."
The same character a few pages later said the same speeder "dropped like a rock", so "freefalling Hutt" was probably just for color.
As the smugglers say, we were putting all our [[hottip:spice: eggs]] in one freighter
basket
.
Don't plot a course into that black hole
go there
.
I get the holo
picture
.
I'll walk away, shedding my crimes like a Trandoshan
snake
sheds its skin.
In that case it was deliberate — a criminal offered to hand over some crucial info in exchange for immunity from prosecution, money, and a way off planet, and was amused when an old enemy was sent to pick him up. He knew she needed the info and was too honorable to go against the deal, so he used this phrase to remind her that he had let the Trandoshan who had murdered a friend walk free.
This really came out of the asteroid belt.
blue.
Alternately, it came out of the black, as in deep space.
"Like a neutrino
hot knife
through plasma.
butter.
"
A similar but less arbitrary example from one of the Young Jedi Knights books: Lando says that a certain diamond drill can cut through durasteel just as easily as a laser can cut through Sullustan jam.
A particularly egregious one: What time is it when an Imperial AT-AT Walker
elephant
steps on your wrist chronometer?
wristwatch?
Time to get a new wrist chronometer.
wristwatch.
Wedge Antilles is said to have ice water in his veins and cold-space lubricants for blood.
"And then ask yourself if that doesn't make you look a bit like a dewback's cloaca
horse's arse
."
The Redwall books love these. Some examples include "the leaf
pot
calling the grass green
kettle black
" and "I'll bet you an apple to an acorn" (the equivalent of "dollars to donuts").
"If wishes were fishes, there'd be no room in the river for water.
horses, beggars would ride.
" (Also many creative insults, the best being "If brains were bread you'd have starved to death before you were born!")
"There's more than one way of frying a frog.
skinning a cat.
" Weird, you'd think Ferahgo would love to talk about skinning things...
From The Iron Sunrise by Charles Stross, we have "Never bring a tazer
knife
to an artillery duel
a gun fight
", and the ReMastered philosophy "Upload
Kill
them all, the unborn god
God
will know its
his
own".
The Hollows has several, such as "You look like the vamp who drained the cat.
"If Ice Bores kill your Ailicorne, make Ailicorne steaks". (Andorian). There are also the Andorian axioms "Absence makes the heart forget" and "What goes around comes around...but with a sharper knife".
The Ferengi morality tale of "The Boy Who Cried Audit"
"Like Honge on fresh meat" (Cardassian). Also the Cardassian saying "the enemy of my enemy is also my enemy, but may prove useful".
"Sap and fog", for when Nasats are being dismissive.
"Screw with the Mugato, you're getting the horn".
"In a Tribble's eye!" (Which didn't need to be said, because McCoy uses the phrase "In a pig's eye!" in the original series).
Dragaera: In the book Issola, Lady Teldra makes a reference to Vlad engaging in "gray humor". This is the equivalent of what we would call "black humor"- the difference is that in the series, black is the color of magic and gray is the color of death.
They also have "how many X does it take to sharpen a sword?" instead of Light Bulb Jokes.
A clever and appropriate use in Robert Heinlen's Starship Troopers novel, "...on the bounce." Its meaning ranges from along the lines of 'don't waste time' to 'stay alert', depending on the context it's used in.
Rosalie hisses "Over my pile of ashes" in Breaking Dawn.
In Insurrection (War of the Spider Queen series) one drow said "putting the cart before the lizard".
Fridge Logic: But why would you kill the wyvern out of greed? Does it puke up the rabbit after fetching it? And they have chickens on Safehold, so why not geese? Why not just use another bird in place of the goose? Arrgh!
Also, "between the doomwhale
Devil
and the deep blue sea."
The End of Eternity by Isaac Asimov: "built like a force-field latrine
Oddly enough, the phrase "what the dickens" actually appears in Shakespeare's writing and has nothing to do with the author Dickens at all ("the dickens" = "the Devil"), but it would be even odder for Charles Dickens to say "what the dickens".
One of the CDi games has "I'm so hungry, I could eat an octorok!
a horse!
"
Wakka instructs Tidus over the course of Final Fantasy X to hold his chocobos. The Chocoboy of Final Fantasy VIII instructed Squall to do the same.
Zork: Grand Inquisitor has several characters exclaim "Holy Hungus!" and/or "Sweet Yoruk!"
Mass Effect 2 features an advertisement for a movie about "Blasto, the first hanar Spectre", whose trademark phrases are "This one has no time for your solid waste excretions" and "Enkindle THIS!"
When you first meet Legion, Tali mentions that a single geth would have no more intelligence than a wild varren. It makes more sense since varren are basically Space Dogs, and 99% of the characters, humans included, probably never saw a real life dog before.
Quarians in general use the term "Kee'lah" in place of "God" *
.]], and "Kee'lah se'lai" is said at the end of certain discussions, including the hearing in front of the admiralty board. Replace it with "God be with you", and it's a perfect fit.
Mass Effect 3 reveals it to effectively mean "The homeworld which I shall one day see.", which is similar, given how mythical their homeworld is to the Quarians by this point.
Dwarven curses in the Dragon Age setting include "Go take a long breath out of a short shaft," which from context and phrasing probably means "Go die in a hole."
It might be a modification of "go take a long walk off a short pier", basically, "shut up" or "go f*ck yourself".
They also use "Nug-humping" where a modern person would probably use "Motherfucking."
In addition, there's the phrase "by the maker", as well as a few references to Andraste throughout both games.
The Mega Man Battle Network series has quite a few of these, primarily in the first three games, where the translators were using Woolseyisms:
"I was programmed
born
ready!"
"You scared me half to deletion!
death!
"
"Prepare to meet your programmer!
maker!
"
All over the place in Homeworld: Cataclysm. Some are reasonable, some are quite grating.
Beast Wars does this a lot, replacing certain lines in stock phrases with robotic related terms. Most famously replacing various expletives with "slag".
Adventures Of The Galaxy Rangers: Upon having to fight their way out of a Earth-government facility, running from the Space Navy, and learning they're headed for Tortuna. "Out of the blast furnace,
's Always Greener": "A rolling stone gathers no Algae!
moss!
"
A number of phrases on Miss Spider's Sunny Patch Friends (which focuses on the adventures of sentient insects and other bugs), but most particularly "hold your horseflies!"
The main character in Widget The World Watcher likes to replace words of common sayings by something space-based.
South Park has these in the "Go God Go" episodes, in the atheistic future, things like "Oh my science
God
!" and "What in science's
God's
name?".
ReBoot used computer jargon to get crap past the radar:
"Me and good old Frisket just kicked Megabyte's bitmap
butt
!"
"If you ask me, they're just covering their ASCIIs
asses
."
Real Life
There was a story in Reader's Digest about a student of medieval history who explained she was far too busy to do something by saying "I've just got too much on my trencher