When something in a show receives a FanNickname which originated with the show's production team. Doesn't count if it's a technical term which can be applied to unrelated shows. Might be related to a DevelopmentGag.

If the series runs long enough, the term runs a high probability of becoming either canon or an in-universe nickname.
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!!Examples:

[[foldercontrol]]

[[folder:Comic Books]]
* The Creator/DCComics writing staff has a long tradition of referring to Mr. Mxyzptlk as "Bill" to sidestep the issue of [[TheUnpronouncable how to pronounce his name]].
[[/folder]]

[[folder:Fan Works]]
* ''Fanfic/AbraxasHrodvitnon'': The author has nicknamed [[TheAssimilator the Many]] "Ghidorah-Flood", she's [[spoiler:nicknamed the reanimated Manda "Zombie Noodle"]], and she's nicknamed the "shed skin" Ni/Elder Brother [=MaNi=]. Meanwhile, the infant Manda is never referred to In-Universe as Mandazawa as the author's Tumblr has called him.
[[/folder]]

[[folder:Films -- Animation]]
* ''WesternAnimation/{{The Hunchback of Notre Dame|Disney}}'':
** The animators decided to nickname Frollo's horse [[FluffyTheTerrible Snowball]]. This has caught on with fans, thanks to an audio commentary, and retroactively also became the name of Jafar's horse and the monster pulling Hades' chariot.
** The sequence for the song "Hellfire" was nicknamed "Mr. Frollo's Wild Ride" by the animation team.
* For ''WesternAnimation/SpiderManIntoTheSpiderVerse'', the Peter Parker who dies early in the film is dubbed [=RIPeter=] [[AllThereInTheScript in the script]]. Meanwhile, Peter B. Parker was referred to as Burrito Peter by the artists, as early versions of the film had him eating those instead of pizza when getting teleported to Miles' dimension.
* ''WesternAnimation/TurningRed'': [[spoiler: Ming's {{Kaiju}}-sized [[AttackOfThe50FootWhatever red panda form]] was referred to in the film's "art-of" book as "Mingzilla".]]
* The roach in ''WesternAnimation/WallE'' is named [[https://en.wikipedia.org/wiki/Hal_Roach Hal]].
[[/folder]]

[[folder:Films -- Live-Action]]
* In ''Film/AliensVsPredatorRequiem'', the Predator was nicknamed Wolf (after [[Film/PulpFiction Winston Wolf]]) and the Predalien was nicknamed Chet (after Bill Paxton's character in ''Film/WeirdScience'').
** The Berserker Predator in ''Film/{{Predators}}'' was nicknamed "Mr. Black".
* The monster bear from ''Film/Annihilation2018'' was nicknamed "Homerton" as a contrast to ''Film/{{Paddington|2014}}'' (one is a dilapidated London overground station, the other an impressive underground one).
* ''Film/AvengersEndgame'': [[spoiler: The merger between Bruce Banner and the Hulk was nicknamed "Smart Hulk" by the filmmakers.]]
* The alternate 1985 in ''Film/BackToTheFuturePartII'' was called "Biffhorrific 1985" during production.
* "Clover" for the monster of ''Film/{{Cloverfield}}''.
* The creature from "The Crate" segment of ''Film/{{Creepshow}}'' was nicknamed "Fluffy" (it even illustrated FluffyTheTerrible).
* Slimer from ''Film/{{Ghostbusters 1984}}'' was called "Onion Head" during production.
* ''Film/GodzillaKingOfTheMonsters2019'': King Ghidorah's MultipleHeadCase three heads are nicknamed Ichi, Ni and San (the Japanese numerals One, Two and Three), with San additionally being called Kevin.
* "Creator/SteveBuscemi", the monster from ''Film/TheHost2006''.
* The shark in the movie ''Film/{{Jaws}}'' was nicknamed Bruce, after Creator/StevenSpielberg's lawyer.
* [[TheRuntAtTheEnd The rhino that lags behind the stampede]] in ''Film/{{Jumanji}}'' was nicknamed "Sneezy" by the effects crew who [[ThrowItIn accidentally created that image]].
* The ''T. rex'' from ''Film/JurassicPark'' is labeled as "Roberta" in some production notes.
* While filming ''Film/ManosTheHandsOfFate'', Harold Warren's crew called the film ''Mangos: The Cans of Fruit'' behind his back.
* The huge battle between Neo and the army of Agent Smith clones from ''Film/TheMatrixReloaded'' was nicknamed "The Burly Brawl" after the screenplay Film/BartonFink was working on. Even the song playing during that scene is named [[https://www.youtube.com/watch?v=xUZKFjaWf6Y Burly Brawl]].
* ''Franchise/{{Saw}}'': Billy the Puppet's name was originally a Production Nickname before it became official.
* Doc Ock's tentacles in ''Film/SpiderMan2'' were dubbed [[Film/TheThreeStooges Moe, Curly, Larry and Joe]].
* In ''Film/TheSpyWhoLovedMe'', the set for Stromberg's supertanker, the Liparus, was nicknamed "the Jonah Set," in reference to [[Literature/BookOfJonah the Biblical story of Jonah]], who is swallowed by a whale. In the film, the tanker swallows submarines.
* ''Franchise/StarWars'':
** The cast and crew of ''Film/ANewHope'' obviously [[ItWillNeverCatchOn had no inkling]] ''Star Wars'' was going to be such a major cultural phenomenon, and casually gave cheap nicknames or even "joke" names to characters who would receive proper names and fleshed-out backstories years later. In one of the more infamous cases, the Tonnika sisters (those two girls with the beehive hairdos in the green jumpsuits we catch a glimpse of in the cantina) were nicknamed [[{{Pun}} "Star Whores"]] for wearing their underpants outside their clothing.
** In ''Film/RogueOne'', two Imperial Star Destroyers are present at the Battle of Scarif. In-universe, they are the ''Intimidator'' and ''Persecutor'' – the ILM crew affectionately called them Timmy and Percy.
** Before BB-8's First Order EvilCounterpart in ''Film/TheLastJedi'' was officially named BB-9E, he was nicknamed "BB-[[PunnyName H8]]" on-set.
* ''Music/TheWall'': The War-Bird featured in the "Goodbye Blue Sky" sequence was also known as the "Bauhaus Concorde."
[[/folder]]

[[folder:Literature]]
* While writing the ''Literature/HarryPotter'' series, Creator/JKRowling mentally used the term "The Big Seven" to refer to Harry, Ron, Hermione, Neville, Ginny, Luna, and Draco.
[[/folder]]

[[folder:Live-Action TV]]
* The Pepperpots (Pythons in old lady drag) in ''Series/MontyPythonsFlyingCircus''.
* ''Franchise/StarTrek'', starting with ''[[Series/StarTrekTheNextGeneration The Next Generation]]'', has "Okudagrams" – the displays on the touchscreens and monitors – after their creator Michael Okuda.
** The engineering access tubes were dubbed "Jefferies tubes", which was a {{canon}} name by ''TNG''.
** Irving A. Feinberg was the property master for ''Series/StarTrekTheOriginalSeries''. The little gizmos he came up with for the show (such as the medical scanner and the laser scalpel) were nicknamed "Feinbergers" by the cast and crew. The usage later spread to the fanbase.
** Similarly, the wall panels were often labeled with seemingly nonsensical phrases, like "[=GNDN435=]". This actually stood for "Goes Nowhere, Does Nothing", indicating the just-for-looks nature of all the pipes and wires in the Enterprise's interior.
** The term "D-7 battlecruiser" was an in-joke originated by Creator/WilliamShatner and Creator/LeonardNimoy mock-arguing on-set one day. As with Jefferies tubes, this eventually became the canon designation for TOS-era Klingon warships.
* Caprica-6 from ''Series/{{Battlestar Galactica|2003}}'', although that eventually made it into the show dialog as well.
* HRG (Horn-Rimmed Glasses) in ''Series/{{Heroes}}''.
** The concentration face Hiro Nakamura makes in order to travel through time or space is apparently called the "squishy blinky" by the production crew.
* The pterodactyl, Myfanwy, in ''Series/{{Torchwood}}''.
* The Barracks on ''Series/{{Lost}}'' are called "New Otherton" by production, which spread to fans and then incorporated into dialogue as Sawyer's nickname for the place.
* On ''Series/StargateSG1'', "kawoosh" was a production nickname used to describe the "unstable vortex" formed when a Stargate opens. The term wasn't used on the show until the episode "Crusade", in which it was coined in-universe by Samantha Carter:
-->'''Mitchell''': I'm sorry, the what?\\
'''Carter''': The unstable vortex of a forming wormhole. Kawoosh!\\
'''Mitchell''': Don't think I've ever heard you call it that before.\\
'''Carter''': Really?\\
'''Mitchell''': Don't get me wrong, it's good.
** It is never said in-series what the [=GDOs=] (the wrist-mounted devices that allow SG teams to send their code so SG-C staff will know it's them and open the Iris) stand for, but for Production they stand for Garage Door Opener.
** In [[Film/{{Stargate}} the movie]], the stargate had a conical vortex coming out the back of it while active, which was called "the strudel" in one of the featurettes. The strudel was dropped in the TV series.
* ''Series/DoctorWho'':
** Several Doctors get nicknames based on the character concepts going around the production office when discussing how the new Doctor should be played:
*** The Cosmic {{Hobo}}: The Second Doctor.
*** The Bohemian: The Fourth Doctor.
** "Fungoid Fred", "Toadstool Taffy" and "Mushroom Malone" are the names of the Fungoids in "[[Recap/DoctorWhoS2E8TheChase The Chase]]".
** "Fred" was also the name of the [[TheDitz stupid Dalek]] in "The Chase".
** "Bafflegab" is what Creator/RobertHolmes called what we on this wiki call {{Technobabble}}.
** A "loop" is a name coined by Creator/TerranceDicks to refer to a story in which the characters [[{{Padding}} get captured, escape and then get captured again by the same people]] to extend a story to six episodes. Not to be confused with a "Moffat loop", which is the nickname coined by Creator/PeterCapaldi and Creator/JennaColeman to refer to the kind of TemporalParadox StableTimeLoop plot that is favoured by Creator/StevenMoffat.
** Creator/RussellTDavies nicknamed the Ninth Doctor's theme composed by Music/MurrayGold "Flavia's Theme" as an fanboy InJoke referring to President Flavia from "[[Recap/DoctorWho20thASTheFiveDoctors The Five Doctors]]", as he'd imagined the OneWomanWail the theme used was sung by Flavia from some ethereal place beyond time for the Doctor whenever the Time Lords came up in discussion.
* On the set of ''Series/TheXFiles'', the ScullyBox was referred to as the "Gilly-Board", referring to actress Creator/GillianAnderson.
* The [=RoboCop=] nickname for John Cable after he become a Franchise/RoboCop in ''Series/RoboCopPrimeDirectives'' first came from the production staff. In the series itself, he's either referred to by his real name or "Crime Prevention Unit 002".
[[/folder]]

[[folder:Video Games]]
* In ''VideoGame/{{Portal}}'', the portal maneuver was called "flinging," and the Aperture Science Material Emancipation Grid was dubbed the "fizzler". [[TheGhost The absent character]] who left behind dens and scrawlings on the walls was named the Rat Man (for his scrounger-in-the-wall habits). Later, he was promoted to a first-order character via an {{interquel}} comic book. His real name is [[PropheticNames Doug Rattmann]].
** In ''VideoGame/Portal2'', [[spoiler:[=GLaDOS=] when turned in a potato battery]] is called [[spoiler:[=PotatOS=]]] by the developers. Also, [[spoiler:Wheatley in [=GLaDOS=]'s body]] is called [[spoiler:[=WheatDOS=]]] in the name of the [[DVDCommentary developer commentary sound file]] that discusses him. The "different" turret you can save from the Redemption Line is called the "Oracle Turret," since everything it says is {{foreshadowing}}.
* The developers of ''VideoGame/NewSuperMarioBrosWii'' allegedly nicknamed Yellow Toad and Blue Toad [[WebVideo/BackstrokeOfTheWest Ala-Gold]] and Bucken-Berry respectively.
* The main character of the ''VideoGame/WingCommander'' series originally had no default name, but the production crew called him Bluehair. He was later given the name Blair[[labelnote:*]]'''Bl'''ueh'''air'''[[/labelnote]] as a nod to this.
* The creature in ''VideoGame/{{Psychonauts}}'' that teleports Raz between different locations in {{Mental World}}s is called Oatmeal by the developers, after a scene in ''WesternAnimation/FrostyTheSnowman'' where one of the kids suggests the name "Oatmeal" for Frosty.
* Guybrush Threepwood, hero of the ''VideoGame/MonkeyIsland'' franchise, was named Guybrush from the file containing the "guy-brush" the developers used to animate his sprite. It stuck as his name.
* Combining this trope with ThemeNaming, most of ''Franchise/TheLegendOfZelda'' games produced in the UsefulNotes/Nintendo3DS and UsefulNotes/WiiU generation are internally named after playing cards. ''[[VideoGame/TheLegendOfZeldaBreathOfTheWild Breath of the Wild]]'' is called "U-King", ''[[VideoGame/TheLegendOfZeldaTheWindWaker The Wind Waker HD]]'' is called "Cking", ''[[VideoGame/TheLegendOfZeldaOcarinaOfTime Ocarina of Time 3D]]'' is called "Queen", ''[[VideoGame/TheLegendOfZeldaALinkBetweenWorlds A Link Between Worlds]]'' is called "Jack", and ''[[VideoGame/TheLegendOfZeldaMajorasMask Majora's Mask 3D]]'' is called "Joker". ''[[VideoGame/TheLegendOfZeldaTriForceHeroes Tri Force Heroes]]'', on the other hand, is called "{{Alice|Allusion}}".
* Similarly, ''Franchise/{{Kirby}}'' games are internally named after desserts: ''VideoGame/KirbyTripleDeluxe'' is called "Parufe" (parfait), and ''VideoGame/KirbyStarAllies'' is called "Eclair". Breaking the pattern, ''VideoGame/KirbyAndTheRainbowCurse'' is called "Seven", probably referring to the seven colors of the rainbow used for the game's seven worlds. ''VideoGame/KirbyAndTheForgottenLand'' is called "Balloon".
* The unreleased game many fans know as ''VideoGame/FalloutVanBuren'' was never actually planned to be released under that name. It would have been called ''VideoGame/Fallout3'' had Creator/{{Interplay|Entertainment}} not gone under, and a proper ''Fallout 3'' didn't come out until Creator/{{Bethesda}} revived the franchise in 2008.
* ''VideoGame/FinalFantasyVII'':
** The poor unnamed RedShirt accompanying Cloud, Tifa and Sephiroth [[spoiler:and Zack]] who dies on the bridge in the Nibelheim mountains was affectionately named 'Zako' by Nojima. 'Zako' is a Japanese slang word referring to {{Mooks}} and also works as a pun on 'Zack'.
** The ''Ultimania'' guide contains concept artworks naming and assigning ages to various characters who are not named or aged in the story. This includes names and ages for Tifa's father (Brian Lockhart, 40) and Cloud's mother (Claudia Strauss – [[TeenPregnancy 33]] – note also she's got a different surname to her son).
* The [[NoNameGiven unnamed protagonist]] for ''VideoGame/SaintsRow'' was referred to as "Mikey" (pronounced "Mickey") during the development of [[VideoGame/SaintsRow1 the first game]].
[[/folder]]

[[folder:Webcomics]]
* ''Webcomic/{{Unsounded}}'': Silverfish is the name Ashley was using for [[spoiler:Starfish's First Silver reanimated corpse]] while working on the pages, and was taken up by readers as well since he/it has no specific name in the story.
[[/folder]]

[[folder:Western Animation]]
* ''Franchise/AvatarTheLastAirbender'':
** The OneWingedAngel form of the Ocean Spirit in ''WesternAnimation/AvatarTheLastAirbender'' was called Koizilla during production. You'd be hard-pressed to find anyone that calls it anything else. Heck, it's a 90-foot carp. Half the people using the term probably [[PhraseCatcher coined it independently]].
** The giant spirit form that Korra takes at the end of Book Two of ''WesternAnimation/TheLegendOfKorra'' is labeled "Cosmic Korra" in the art book.
* ''WesternAnimation/BobsBurgers'': The town where the Belchers live is somewhere in New Jersey, according to a FreezeFrameBonus in "It Snakes a Village", but [[CityWithNoName has no official name]]. It's known to the cast and crew as "Seymour's Bay", after the show's film editor Mark Seymour, and as of the season 9 premiere it seems to have become official.
* ''WesternAnimation/StarWarsTheCloneWars'': Maul's Mandalorian warriors were nicknamed "Mauldalorians" by fans. When the show was revived for Season 7, art from production calls them the "Mauldalorians" and their Twitter hashtag to promote the show also calls them "Mauldalorians", though this is not used in-universe.
* ''WesternAnimation/StevenUniverse'':
** Storyboard artist Jesse Zuke (then known as Lauren Zuke) dubbed the [[NoNameGiven unnamed]] Mystery Girl resembling Rose Quartz in "Last One Out of Beach City" [[Music/TheRamones "Sheena"]]. All that is known is that her name starts with "S".
** [[spoiler:Steven's Gem half after White Diamond rips out his gem]] in "Change Your Mind" is never named in the show or even the credits, but is called "[[spoiler:Pink Steven]]" on [[http://stevencrewniverse.tumblr.com/post/182283886752/new-forms-from-change-your-mind-character his model sheet]].
[[/folder]]
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