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->'''Lisa:''' ''[gasps]'' That sounds like Sideshow Bob!\\
'''Homer:''' Yes, ma'am. Sideshow Bob, yakking it up on the old yak box.\\
'''Lisa:''' Dad, I'll spare you the embarrassment of admitting you don't know who Sideshow Bob is.\\
'''Homer:''' Phew!
-->-- ''WesternAnimation/TheSimpsons'', [[Recap/TheSimpsonsS6E5SideshowBobRoberts "Sideshow Bob Roberts"]]

A character (often TheDitz) encounters a word or phrase, and makes some comment expressing what he thinks about the thing the word refers to just before revealing that actually, he doesn't know the word at all. ''("Lorem Ipsum is terrible! By the way, what's Lorem Ipsum?")''

If the character doesn't outright imply that he knows what the thing is, but is willing to venture a ''guess'', that guess will likely be IsItSomethingYouEat While that trope overlaps with this one, it generally involves an honest uncertainty, while this one is about dishonest certainty ("Of course I know that gazebos are something you eat.")

The thing in question just might turn out to be a [[WhatsAHenway Henway]].

SubTrope of FeigningIntelligence, although the feigning is usually quite brief before the character admits she really doesn't know what she's talking about. Not to be confused with {{Malaproper}}, which is when the character misuses words ''without knowing'' that he don't know what the words mean (honest, but false, certainty). Completing the quadrangle is ObfuscatingStupidity, which is dishonest uncertainty/ignorance. Related and often a SuperTrope to CallingMeALogarithm, which is where someone takes offense to a word they don't know the meaning of, with or without pretending to know what it means.

Compare TwoFacedAside.



[[folder:Anime & Manga]]
* ''Manga/{{Yotsuba}}'': Upon being told that they got tickets to Water World, Yotsuba says, "Ohhh! That place!?" Jumbo asks whether she knows it: "... Not really."
* In one episode of ''Anime/DiGiCharat Nyo'', the town is out of natto, so Gramps suggests going to the next town over to get some. Gran immediately gets spooked, but then asks, "Where is the next town, anyway?"
* In ''Manga/BlackButler'', Lau does this ''all the time''. While investigating UsefulNotes/JackTheRipper, Ciel announces to his companions that to get information on the killer they must go see... and Lau reacts in shock/horror. When they reach the location of their informant (the Undertaker), Lau finally asks, "So where are we?"
* The first episode of ''Anime/SailorMoon'' had this exchange.
-->'''Naru:''' Did you hear? Sailor V stopped another robbery!\\
'''Usagi:''' That's so cool!\\
'''Naru:''' Isn't it?\\
'''Usagi:''' What's a Sailor V?
** Done again by Usagi in ''Sailor Moon R'' after Luna and Artemis figure out they're dealing with a Makai tree.
* An episode of ''Anime/{{Pokemon}} the Series: XY'' features this gem:
-->'''Ash:''' Awesome, that sounds so cool. I wish I knew what that meant!"\\

[[folder:Comic Strips]]
* In a ''ComicStrip/CalvinAndHobbes'' strip, Calvin is told that dinner will be tortellini, and complains at length about how disgusting it is. In the last panel, he's looking up the word in the dictionary.
* Truman does this often in ''ComicStrip/LibertyMeadows''.
-->'''Dean:''' Hey Truman, want to play football with us?\\
'''Truman:''' ''[dancing around]'' Football? Oh joy! There's nothing like football! Um... what's "football", sir?

[[folder:Films -- Animation]]
* In ''WesternAnimation/MyLittlePonyEquestriaGirlsRainbowRocks'', Twilight mentions to her Equestrian friends that the trouble caused by the Dazzlings sounds like the work of the Sirens.
-->'''[[CloudCuckoolander Pinkie Pie]]:''' ''NOT'' THE ''SIRENS''! ''[stage-whisper to Fluttershy]'' I don't actually know what that is...
* In the ''Disney/{{Aladdin}}'' sequel ''The Return of Jafar'', after Sultan announces that he wants to make Aladdin the royal vizier, Genie pretends to be a newsman and souvenir seller announcing the new Royal Vizier and repeating the phrase several times, only to turn to Sultan afterwards and ask "What's a royal vizier?"
* In ''Disney/TheThreeCaballeros'', Panchito's gift to Donald is a piñata. Donald says, "Oh boy, oh boy! A piñata!... What's a piñata?"
* In ''WesternAnimation/AnAmericanTailFievelGoesWest'', after Fievel stabs him in the butt with a fork, Cat R. Waul orders his spider lackey Julep to track down "the subversive who attempted to assassinate me."
-->'''Julep:''' Ooh, I just ''love'' finding subversives! Hey boss, what's a subversive?\\
'''Cat R. Waul:''' [[ImpliedDeathThreat Someone who doesn't have very long to live...]]
* In the ''Disney/TheHunchbackOfNotreDame'', as they're preparing to find the Court of Miracles to warn the gypsies about Frollo's attack, Quasimodo shows Phoebus the amulet Esmeralda gave him.
-->'''Phoebus:''' ''[holding up the amulet]'' Good, good! Ah... great... what is it?
* ''WesternAnimation/{{Up}}'' has Russel do this when the pair meet Carl's childhood hero.
-->'''Carl:''' That's Charles Muntz!\\
'''Russel:''' ''[excitedly]'' It is!!!... Who's Charles Muntz??

[[folder:Films -- Live-Action]]
* ''Film/{{Enchanted}}'': Justified as Edward and Giselle came from a fairy tale realm where the custom was to meet one day, fall in love and wed the next. Now both are in the human world.
-->'''Giselle:''' I want to go on a date.\\
'''Edward:''' ''[excited voice]'' A date!... What's a date?
* In ''Film/TheAdventuresOfRockyAndBullwinkle'', Boris (in cartoon form on a TV set) asks Minnie Mogul about producing a ''WesternAnimation/RockyAndBullwinkle'' movie. She leaps at the proposition before asking him what is ''Rocky and Bullwinkle''.
* In ''Film/TheFellowshipOfTheRing'', at the foundation of the Fellowship, Merry and Pippin barge in and vocaly and adamantly declare that they are joining the crew. Nobody really objects, and all seems settled, and then Pippin cheerfuly asks where exactly will they be heading.
* Quill to Gamora in ''Film/GuardiansOfTheGalaxy'': "Yeah, We know who you are." (turning around to Groot, whispering) "Who is she?"
* ''Film/WhatsNewPussycat'' begins with Dr. Fassbender and his wife Anna in a heated shouting match:
-->'''Anna:''' Lascivious adulterer!\\
'''Fassbender:''' Don't you dare call me that again until I have looked it up!

[[folder:Live-Action TV]]
* ''Series/HowIMetYourMother'':
** Ted once gushes about how his current GirlOfTheWeek was taking classes in Krav Maga (an Israeli system of hand-to-hand combat). When she leaves, he admits that he doesn't really know what it is, but presumes it's some kind of yoga. He later finds out when [[spoiler:she beats him up for breaking up with her... [[KickTheDog on her birthday]]... for the second time]].
** Later seasons have various characters insulting each other and getting this as a RunningGag response. For example:
--->'''Robin:''' You're a stamp tramp.\\
'''Marshall:''' How DARE you?! ...and what is that?
* ''Series/{{Best Friends Whenever}}'': Shelby does this in the episode "The Butterfly Effect".
-->'''Barry:''' Have you ever heard of the butterfly effect?
-->'''Shelby:''' I've heard of it. But can you explain it in case someone else didn't.
-->'''Naldo:''' I know what it is.
-->'''Cyd:''' Me too.
-->'''Shelby:''' Just let him explain.
* ''Series/ParksAndRecreation''
** Andy's response when Tom offers him a job at Entertainment 720:
--->'''Andy:''' (excitedly) "Oh my God!" (Beat) "What is that?"
** Leslie announces her former friend has put up a fence between Pawnee and Eagleton:
--->'''Leslie:''' Lindsay Carlyle Shay.
--->'''Andy:''' (agrees disgustedly, then...) "Who?"
* On ''Series/{{Community}}'' we get this exchange:
-->'''Dean:''' The prize was a Blu-ray DVD player... but it got stolen. So now it's TBD!\\
'''Troy:''' I want TBD! Is that new?
* One of Max's {{Catch Phrase}}s on ''Series/GetSmart'' was "A [X]! Of ''course'', a [X]! Just one thing -- what's a [X]?"
* This exchange in ''Series/{{Victorious}}'':
-->'''Jade:''' Our pristine little friend Cat has never had a taco.\\
'''Cat:''' I'm not that pristine. ''[pause]'' Wait, what's pristine mean?
* In the ''Series/DoctorWho'' serial "City of Death":
-->'''Guard:''' Soon, you will be interrogated by Captain Tancredi.\\
'''The Doctor:''' Captain Tancredi?!\\
'''Guard:''' Do you know him?\\
'''The Doctor:''' No.
* On ''Series/{{Lost}}'', Sawyer reacts badly to the news he has hyperopia... but asks what it is. [[spoiler:Hyperopia is being far-sighted.]]
* Brain Fellows from ''Series/SaturdayNightLive'', who claimed to be an expert on whatever animal was being brought to his show, then once the zookeeper brought it in he'd ask "what's that?"
* In the ''Series/{{Blackadder}} The Third'' episode "Dish and Dishonesty", following the death of Sir Talbot Buxomly:
-->'''Blackadder''': Sir Talbot represented the constituency of Dunny-on-the-Wold, and, by an extraordinary stroke of luck, it is a rotten borough.
-->'''George''': ''(enthusiastically)'' Really? ''Is'' it? Well! Well, lucky, lucky us! Lucky, lucky, luck, luck, cluck, ''claaark''-cluck-cluck-cluck...
-->'''Blackadder''': ''([[DeadpanSnarker utterly expressionless]])'' You don't know what a rotten borough is, do you, sir?
-->'''George''': No.
-->'''Blackadder''': So what was the chicken impression in aid of?
-->'''George''': I didn't want to hurt your feelings. So, what is a rubber button?
* ''Series/BlakesSeven''. ThoseTwoBadGuys are discussing what the next target in TheWarOfEarthlyAggression will be.
-->'''Quute:''' Wanta?
-->'''General:''' That's our next assignment. Something to look forward to, eh?
-->'''Quute:''' Yes, sir. ''[with patent insincerity]'' I'm looking forward to that no end. ''[beat]'' Where exactly ''is'' Wanta, sir?
* In an episode of ''Series/TheWestWing'', C.J. is at a firing range with a Secret Service agent and asks what kind of gun he has. When he tells her it's a .357 Magnum, she eagerly replies, "I've heard of that!" Apparently, she hasn't heard enough about them, because she wants to fire it, despite never having fired a gun before, and is promptly knocked back on the ground by the force of the shot.
--> "That thing practically broke my arm!"

* Pulled several different ways on ''Radio/TheGoonShow'', including:
-->'''Major Bloodnok:''' Neddie Seagoon? I didn't recognize you!\\
'''Ned Seagoon:''' Why not?\\
'''Bloodnok:''' I've never seen you before!

* In the musical ''Theatre/TheBookOfMormon'', upon hearing that he and his mission companion are being sent to Uganda, Elder Cunningham exclaims "Uganda? COOL! ...where is that?"

* ''Toys/{{Bionicle}}'':
** Pohatu does this as a RunningGag.
--->'''Pohatu:''' A Toa? Oh great, I've always wanted to be a Toa! Just one thing... What's a Toa?
** Later...
--->'''Pohatu:''' ...What's a Bohrok?
** And again:
--->'''Pohatu:''' ...What's a Rahkshi?
** One more time:
--->'''Pohatu:''' ...What's a Solek?

[[folder:Web Comics]]
* ''Webcomic/ElGoonishShive'' has a case of this in the mini-arc [[http://www.egscomics.com/index.php?id=118 "Catnip"]]
--> '''Tedd:''' ''[jumping]'' '''''Catnip!!!!'''''\\
'''Grace:''' ''[joining him]'' Yay catnip!!! ...what's catnip?

[[folder:Web Original]]
* The [[http://dndshallneverdie.blogspot.com/2007/11/from-dread-gazebo-part-of-blackhammers.html Tale of the Dread Gazebo]] is based around this Trope.
* From ''[[http://www.youtube.com/watch?v=mVvIOoMvXVM Alex Reads Twilight]]'', we have a variation: "Fucking Lauren, man. What the fuck is Lauren in this book? Just coming in, ruining our protagonist's life, I hate Lauren! Who's Lauren??"
* Commonly used by Apple of ''WebAnimation/InanimateInsanity'', since she's "definitionally challenged".
* Found in ''WebOriginal/CriticalRole'': Pike (played by Ashley Johnson) returns to the party after an absence, and Keyleth excitedly tells her about Kashaw, a new acquaintance of the party who, like Pike, is a cleric. Pike asks what god Kashaw follows and is told that he follows Vesh. Ashley expresses recognition, is hastily told by the Dungeon Master that Pike has never heard the name before, and Ashley adjusts Pike's reaction accordingly.

[[folder:Western Animation]]
* In ''WesternAnimation/{{Archer}}'', when Sterling reveals he has cancer, everyone gasps. Then [[TheDitz Cheryl/Carol]] asks what cancer is. Later in the episode, she still doesn't know what cancer is.
* ''WesternAnimation/{{Futurama}}'':
** "[[Recap/FuturamaS1E4LovesLaborsLostInSpace Love's Labors Lost in Space]]":
--->'''Leela:''' That's Zapp Brannigan's ship.\\
'''Fry:''' ''The'' Zapp Brannigan?\\
'''Leela:''' Uh-huh.\\
'''Fry:''' Who's ''the'' Zapp Brannigan?
** "[[Recap/FuturamaS7E1131stCenturyFox 31st Century Fox]]":
--->'''Fox hunter:''' View-halloo!\\
'''Bender:''' View-halloo? ''[pumps fist]'' All right! What does that mean?
* Botch in ''WesternAnimation/TheHairBearBunch'' episode "Panda Pandemonium" after he and Peevly discover Percy, a baby panda who was displaced from his transport to the St. Louis Zoo:
-->'''Botch:''' A panda? Gosh! A panda! A real live panda!... What's a panda?
* ''WesternAnimation/TheHectorHeathcoteShow'' cartoon "Pig in a Poke" demonstrates its title with Hector assigned to accompany Lewis and Clark to see if the Louisiana Purchase is worth executing. His dog, Winston, posits this at the end:
-->'''Winston:''' There's just one thing that's puzzled me from the very start. What ''is'' a pig in a poke?
* GIR from ''WesternAnimation/InvaderZim'' pulls this quite a lot. Often with things that he has [[{{Cloudcuckoolander}} previously proven beyond all doubt that he understands]].
--> '''Zim:''' Do you realize what this ''means''?!\\
'''GIR:''' Yes! Wait a minute... no.
* In the ''WesternAnimation/KingOfTheHill'' episode "Texas City Twister" when Hank and Bobby drive to the Megalo Mart to buy some fuel filters a riot has broken out because of the tornado and Hank reluctantly purchases a pack for 60 dollars, when suddenly an old woman runs up to the counter and says "Hurry honey this jackass is buying all the fuel filters!", her husband replies "Leave some for us jackass!" and a woman says "I need a fuel filter!, what are they for?, I need one!".
* ''WesternAnimation/TheLooneyTunesShow'': In "Bugs & Daffy Get a Job", Dr. Weisberg tells Daffy that he has a deviated septum. Daffy's reaction is to snap "I do not!" and slap Weisberg, before asking "What's a septum?".
* The writers of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' seem to like this joke:
** In "The Ticket Master", Rarity tells Pinkie Pie and Twilight Sparkle that The Grand Galloping Gala is where she's destined to meet "[[RedStringOfFate Him!]]" Pinkie Pie immediately echoes her with an admiring "Him!" only to follow it with "Who?"
** Pinkie Pie has a similar reaction in "Sonic Rainboom" on hearing about the eponymous stunt Rainbow Dash is trying to master.
** In "Pinkie Pride", Fluttershy reacts with shock when Pinkie Pie challenges Cheese Sandwich to a Goof-Off... then admits to Applejack that she doesn't know what a Goof-Off is.
** In "Buckball Season", Rainbow Dash is all pumped to help Applejack put together a winning buckball team... she just has one question. "What's buckball?"
* ''WesternAnimation/ThePenguinsOfMadagascar'', episode "Otter Gone Wild". Marlene, having been born in captivity, is shown to be completely unfamiliar with life outside the zoo. [[spoiler:She even goes feral upon leaving zoo grounds]].
-->'''Private:''' We're going for yummy snow cones, Marlene. Wanna come?\\
'''Marlene:''' Snow cones? Oh, snow cones are the best! Real quick: A snow cone is...?
* ''WesternAnimation/PhineasAndFerb'', "Cheer Up, Candace!": Candace and Stacy are in a comedy club Phineas and Ferb built in their efforts to cheer up Candace:
-->'''Ferb:''' What's the deal with airline food?\\
''[audience laughs]''\\
'''Stacy:''' ''[laughing]'' What's airline food?
* In one episode of ''WesternAnimation/PoundPuppies2010'', [=McLeish=] describes his plans for an adoption fair, and Olaf approves: "I just love adoption fairs. Even though I've never been to one before. In fact, I don't even know what one is."
* Invoked in ''WesternAnimation/RickAndMorty'': Rick makes a joke comparing Jerry to someone. When Summer and Morty laugh, Rick explains the name he mentions is made up, [[SecretTestOfCharacter he just wanted to know if they were sycophantic enough to laugh anyway]].
* ''WesternAnimation/SpongeBobSquarePants'':
** "Opposite Day":
--->'''Patrick:''' Opposite Day? Hey, I've heard of that!\\
'''[=SpongeBob=]:''' You have?\\
'''Patrick:''' [[TropeNamer No! What is it?]]
** In "Tea at the Treedome", Sandy mentions that she needs to breathe air, and [=SpongeBob=] replies, "Me too!" Then he goes to Patrick and asks him what air is. Naturally, Patrick gives him the wrong information and [[HilarityEnsues Asphyxiation Ensues]].
** In "Patty Hype" the Krusty Krab is robbed of (yet another) customer when a man runs in and says that a different restaurant has a talking dog. The customer goes with him because he thinks it's cool, and then asks [[FurryReminder what a dog is.]]
* ''WesternAnimation/StarVsTheForcesOfEvil'': In "Fortune Cookies", Star sounds enthusiastic at the idea of Chinese food... before admitting she has no idea what that is.
* ''WesternAnimation/StarWarsRebels'':
** [[Recap/StarWarsRebelsS1E08PathOfTheJedi "Path of the Jedi"]]: After Ezra gets a [[PowerCrystal kyber crystal]] from the Lothal Jedi temple:
--->'''Kanan:''' Ezra, that's a kyber crystal.\\
'''Ezra:''' Wow! ''[{{beat}}]'' What's a kyber crystal?
** [[Recap/StarWarsRebelsS1E09IdiotsArray "Idiot's Array"]]:
--->'''Sabine:''' I don't suppose you'd like to see some of my more impressionistic pieces?\\
'''Lando:''' I happen to be an impressionistic connoisseur. ''[to Ezra]'' That means--\\
'''Ezra:''' I know what it means.\\
''[Sabine and Lando leave]''\\
'''Ezra:''' ''[to Zeb]'' Wait, what does that mean?\\
'''Zeb:''' [[DeadpanSnarker A lot less than he thinks.]]
* ''WesternAnimation/StevenUniverse'':
-->'''Greg:''' If we do this right, we might get political favors!\\
'''Steven:''' I'm not sure what that is, but I like it!
* In ''WesternAnimation/{{Wakfu}}'', Sadlygrove pulls one on the party's first visit to the Sadida kingdom, after Evangelyne advises them that in the royal palace, they should act like gentlemen and with courtesy.
-->'''Sadlygrove:''' Please Eva, who do you think I am? I am a knight; I know about "gentlemaning".\\
''[stage-whispers to Ruel]'' Who's this "courtesy" guy?