!!General Fanon
* The more widespread piece of fanon in ''Literature/HarryPotter'' is the version Hogwarts uniform that includes skirt/trousers, shirts and house-specific ties, with robes on top (which are also sometimes lined with their house colours). This comes from the [[Film/HarryPotter movies]] - the canon uniform consists of plain black robes, with no house markings.
** This should be obvious by anyone who's read ''Chamber of Secrets'', since Harry and Ron wouldn't have mistaken a Ravenclaw for a Slytherin had half her uniform been ''blue''.
** For [[SelfFanservice some reason]], said skirt on the {{fanon}} Hogwarts uniform for girls is almost always depicted as a short mini-skirt in fanart (in spite of it being around knee-length in the movies, most likely due to the RuleOfSexy).
* There was a widespread notion that Ginny's name was short for Virginia, until JKR revealed that her full first name was actually Ginevra.
* The spell called 'tempus' that tells the time is pure fanon, despite what many {{fanfic}} authors think.
** As are 'wards'. The word is used exactly once in the books, and that one does not refer to protective magic.
* Nowhere are Moony, Wormtail, Padfoot, and Prongs actually referred to as the Marauders. In fact, with regards to the map they made, it's the singular: "Marauder's", not "Marauders'".
** WordOfGod claims that they referred to themselves as such, but that was ''after'' it was widespread fanon. By then it was the [[AscendedFanon easiest way out.]]
* A similar one is the fandom insistence that Fred and George routinely refer to themselves/each other as Gred and Forge. This was a one-off joke in the first book, when their mother made them Christmas sweaters with their initials on them. Apparently people really liked it.
** Annoyingly, most fanfic gets it backwards. They had sweaters with their correct initials, the joke is that George didn't know the ''rest'' of their names. And he also apparently thinks Percy's name is 'Prefect'.
*** They also usually finish each other's sentences in fanfics, which happened less than a handful of times in {{Canon}}.
* In canon Molly had two brothers (possibly twins?) named Fabian and Gideon, who died fighting Death Eaters. A common {{Fanon}} belief is that Fred and George's initials were meant to honor them, and/or that "Fabian" and "Gideon" are their middle names.
* The idea that Tonks and Charlie, who due to match likely went to school together, were very close - if not childhood friends - and had a relationship that didn't work but ended amiable out is very common, always with the inclusion of some kind of affectionate nickname on Tonks' part. You'd think this would've be brought up in the gang's conversation about Tonks joining the family in ''Phoenix.'' Interestingly, this usually isn't used to break up the ship between Remus and Tonks, but more for background for those two characters.
* Similarly, Percy and Oliver Wood are often paired together or imagined as friends, apparently just because they were in the same year.
* Also, Rowling has ''never'' said that Grindelwald was Dumbledore's lover. Fandom made the leap from a simple "Dumbledore loved Grindlewald" to "they were shagging like bunnies". [[http://harryahistory.com/2010/02/vault-xx-dumbledore-and-grinde.html Grindelwald was aware of his friend's feelings, and exploited them]]. Of course, that's still open-ended enough to allow fans to continue their field day.
-->'''Rowling''': I think he was a user and a narcissist and I think someone like that would use it, would use the infatuation. I don't think that he would reciprocate in that way, although he would be as dazzled by Dumbledore as Dumbledore was by him, because he would see in Dumbledore, 'My God, I never knew there was someone as brilliant as me, as talented as me, as powerful as me. Together, we are unstoppable!' So I think he would take anything from Dumbledore to have him on his side.
* It's generally taken for granted that Snape is Draco's godfather. It's stated nowhere in canon, but most people believe it to be as true as the fact that Sirius is Harry's godfather.
** Also, the idea that the Malfoys and Snape knew each other was around long before the sixth book, which was the first time they even interacted with each other. Before JKR made it canon, the only connection between Snape and Lucius was that they were both Death Eaters and Snape's tendency to praise and shield Draco.
* Oh, that crazy Head Boy and Girls' dormitory which only exists in fanfiction! This has been around so long that the specifics of the room have been pretty much codified. It's inside a tower. It normally contains a common room with two separate dorm rooms, one for the Head Boy and one for the Head Girl. There's always only one bathroom to ensure [[HilarityEnsues hilarious sexual hijinks]]. It's often entered through a painting with the subject of the painting and the password being something vaguely romantic. You'd think Dumbledore would have something better to do than to be TheMatchmaker!
* "Magical Cores", which are basically power levels, show up in about ninety percent of HP fanfiction and only there, there is not the slightest hint in canon at anything like that.
** If anything, people thinking that every wizard or witch has some sort of innate genetic magical potential are missing the point of the entire series.
* There's also "Ancient and Noble Houses", and their magical Lord rings. The only time a character talks about them, it's Sirius Black referring to his family, and he was mocking their pureblood ideals.
* A number of Snapefics have him referring to or thinking of his Slytherin students as his "little snakes", prompting a HehHehYouSaidX response from [[http://szaleniec1000.livejournal.com/tag/little%20snakes many readers]].
* Since Hermione's parents' names are never mentioned, fanfic writers have instead invented their own. Roger and Helen crop up frequently; [[Creator/DanielRadcliffe Dan]] and [[Creator/EmmaWatson Emma]] were common for a while, but have since dropped in popularity, probably after everyone figured out how cringe-inducingly meta it was. Then there was a wave of Rose and Hugo (since Hermione's just as creative as Harry is) and even a bit of Wendell and Monica (Hermione's probably clever enough not to give her parents their real names as false names).
* Some of the very minor student character have been used as {{OC Stand In}}s enough to develop fanon personalities. Daphne Greengrass is an IceQueen, but free from pure-blood prejudice and at least slightly more sympathetic than Pansy. Tracey Davis is Daphne's best friend and is more easygoing. Padma Patil is the [[SiblingYinYang opposite of Parvati]] and possibly the second brightest student of her year after Hermione. Blaise Zabini is a [[TheCasanova suave player type]]. Theodore Nott is a {{Jerkass}} and when the other Slytherins are portrayed more positively, he'll be the [[TheComplainerIsAlwaysWrong voice of pure-blood prejudice]].
** Since the only things known about Blaise before ''Half Blood Prince'' were his name and that he was in Slytherin (from the sorting ceremony in ''Philosopher's Stone''), many fans assumed he was a she -- and ''no one'' ever guessed he was black. Most Fem!Blaises were [[RavenHairIvorySkin porcelain-skinned beauties of obvious Italian heritage]].
** Theodore Nott is also usually portrayed in fanfic as a close friend of Malfoy, despite WordOfGod saying that he's a loner who doesn't feel the need to fit in with Malfoy and his cronies.
*** This has at least some canon backing, since Nott is an old friend of Malfoy's, and [[WordOfGod one of the only people he considers an equal]]. Rowling even wrote a scene with the two of them in Malfoy Manor, but couldn't fit it anywhere. He's just not one of Malfoy's goons.
*** Theodore, when given character development, ends up either the cruelest Death Eater out of all the Slytherins, or a sympathetic character that secretly sabotages the Death Eaters from the inside.
** Although we see enough of Pansy Parkinson to know that she's the AlphaBitch, we know nothing about her life outside of Hogwarts. The usual fanon is that she's from a lesser pure-blood family known for sucking up to people like the Malfoys. Thus, Pansy is a social climber hoping to become a Malfoy by marriage, which fits the [[ClingyJealousGirl usual view of her character]].
** Views on Astoria Greengrass differ. Since she's a very minor character who's never mentioned in the books and is only known for being Daphne's younger sister and [[spoiler:Draco's future wife]], she's ripe for tons of interpretations. A popular one is that after the war, she [[BroodingBoyGentleGirl played the gentle girl to Draco's brooding boy]] and helped him get back on his feet.
* Then there's the idea that when the officiator said Bill and Fleur were "bonded for life" he meant it literally, and wizard weddings involve magic that forces the couple never to cheat on each other or divorce.
* In the first and third books, Gryffindor gets House Cup points for its Quidditch performance. This has lead to the common assumption that a House's Quidditch points (10 points for scoring a goal, 150 for catching the GoldenSnitch) are simply added to the House points (5 points for answering a question right, etc), but the books contradict this- in ''Chamber of Secrets'' Gryffindor earns only 50 points for winning its first match, and if this were the case they'd have to earn at least 150 for winning. ''Prisoner of Azkaban'' offers some evidence that it's the margin of victory that matters, since in this one it's not enough to just win the game, Harry has to wait until his team is in the lead by a specific margin, and it sounds like the win of the cup also secured the house cup for Gryffindor.
* Voldemort's line "there is no good and evil, there is only power, and those too weak to seek it" gets quoted a lot, as though it were the official creed of the Death Eaters or something. Which might be ''possible'', but it's never mentioned to be the case. The line is, after all, only spoken once in the entire series.
* Tom Riddle's orphanage was run by nuns. This fanon was completely justifiable, even likely, until you actually meet Mrs. Cole. Nevertheless, it still persists in the world of fanfiction.
* To show that Harry knows more than he should (especially in PeggySue fics), the Sorting Hat is referred to as "Adrian", even though a name for it is never mentioned in the books.
* The notion that Professor [=McGonagall=] went to school with Tom Riddle and was an Auror during the War against Grindelwald crops up frequently. Also popular is the theory that she was a champion Quidditch player (usually Beater or Chaser), that she was a notorious prankster (or a notorious IceQueen bookworm, or sometimes, if the author is feeling clever, a notorious IceQueen who was secretly the forerunner to the Weasley twins), and that she was best friends with Pomfrey and Sprout. [[spoiler:Pottermore confirms that she was indeed a Chaser.]]
* Another near-universal belief is that Susan Bones is a redhead with (after puberty, at least) an impossibly voluptuous figure. Her hair color is never mentioned in the books, but she does have red hair in the first film, in which she was played by Creator/{{Chris Columbus}}'s [[TheCameo daughter]].
* A common theme in "X Reads the Harry Potter books" (and possibly in other types of fics as well) is that Remus has an obsession (or at greatly enjoys) chocolate. [[NewerThanTheyThink This probably comes from]] [[Fanfic/TheShoeboxProject The Shoebox Project]], a fic that inspired quite a lot of common Marauder tropes. In it, chocolate is randomly Remus' TrademarkFavoriteFood. Everyone copied it, and it caught on.
* Masteries, apprenticeships and other levels and certifications of magical education beyond Hogwarts are entirely a fan creation; [[WordOfGod JK Rowling]] has [[{{Jossed}} explicitly stated]] that there's nothing more to learn after seventh year.
* The idea that snake Harry set free from the zoo in the first book later became Nagini. This was a popular fan theory before the end of the series. After the series ended, it was sort of forgotten that the theory had never actually been confirmed and it slipped into the realm of fanon. There's even an associated quote attributed to Rowling, but GodNeverSaidThat. In fact, it doesn't make any sense anyway, since the snake at the zoo is a Boa Constrictor and Nagini is a venomous snake. Also, the snake at the zoo had a male voice in the film and Nagini is a female.
* ''TheDracoTrilogy'' either created or codified the notion that the Malfoy family home is called "Malfoy Manor". Pretty soon it became fanon that every rich pure-blood family lives in a mansion called "[last name] Manor", even as the canon contradicted this by showing that the Black family, at least, lived at Number 12, Grimmauld Place‎ (don't think this has stopped "Black Manor" from showing up in fanfiction). The name "Malfoy Manor", however, got canonized in ''Literature/HarryPotterAndTheDeathlyHallows''. Whether Cassandra Claire [[IKnewIt guessed accurately]] or Rowling just used the fanon name is unclear. (It's worth noting, however, that ''The Draco Trilogy'' uses the terms "Malfoy Manor" and "Malfoy Mansion" interchangeably, but only the former name got picked up.)
* It's a popular WMG that ''Series/WizardsOfWaverlyPlace'' takes place in the same universe as ''Harry Potter''.
* Nearly every depiction of adult!Teddy gives him [[YouGottaHaveBlueHair blue hair]], perhaps to match [[BlueBoyPinkGirl his mom's pink]].
* Oh, the fics where all the Marauders live together, even after James is married. One person rightly called it "Lily playing [[Literature/PeterPan Wendy Bird to a den of Lost Boys]]".
* It's often suggested that wizards use betrothal contracts. This has never been exactly stated, and fanon mainly uses it to justify putting Harry with other females, or to be used to try and force him and Ginny together.
* It may have been Grindlewald's phrase, but many assume that Dumbledore, particularly his bashed form, works to obtain his own 'Greater Good'.
* If fanon were true, Veela bond with their mates magically, and their reputation as heart breakers came from them being forced by their nature to go after mates with a certain high percentage. If a more compatible (Harry) is known by a Veela (Fleur), she is forced by her nature to leave her old boyfriend (Bill) to do so. This is basically the crux of any pairing with Harry to Fleur or Gabrielle.
** There's also the whole issue of ''male'' veela. In canon, we only see veela women, though it's never explicitly stated that males don't exist. (Presumably they would have to for "part-veela" to mean anything.) In fanfiction, you get weird ideas like Draco being a male veela who undergoes his own magical love-bond, usually with either [[FoeYay Harry or Hermione]].
* Alternatively, veelas have a predestined 'mate,' often with the caveat that the veela will die if they do not have sex by a certain point. Fleur's arc with Bill blatantly proves this false, but that doesn't seem to matter. More often used to force a same-sex pairing into play. Can also be done with werewolves, vampires, animagi, elves, or pretty much any magical demi-human.
* Magical society [[NoWomansLand discriminates against females]], which is 100% fanon. Though they do acknowledge Amelia Bones as the exception that makes/breaks the rule.
* The Potters and Longbottoms were never shown to be friends, aside from Harry and Neville, but fanfiction often depicts them as ancient allies and Alice as Harry's godmother and close friend of Lily's.
* The Weasleys lost their wealth from either an ancient gambling relative, or from fees for a crime, a theme much rarer. Never said to be true.
* Magical Guardians are a completely fanon creation, in their expanded role beyond that of a regular Guardian.
* Harry having a godmother, who's usually Alice Longbottom.
* At times, people in fanfiction depict the dislike of minorities, like Indians and Asians. This has no merit, seeing as Cho Chang was shown to be very popular.
* In fanon, Molly Weasley often has a dislike for Veela. In canon, it was always stated that she disliked Fleur for her personality... until Fleur showed that she wouldn't leave Bill, even when he was maimed by Fenrir Greyback.
* Fans have a habit of forgetting basic things, such as the fact that all three Malfoys' one redeeming quality is that they love each other. Why so many fans depict Lucius, and just a bit less often Draco, as heartless wife/mother abusers is a mystery of the world.
* Fudge and Umbridge's houses were never confirmed, but they always seem to be Slytherins, though Umbridge is also portrayed as a Hufflepuff fairly often. Given that she's very loyal to Fudge, she fits the bill for Hufflepuff well. WordOfGod is that [[http://www.leakynews.com/breaking-umbridges-hogwarts-house-revealed/ she was in Slytherin]].
* Andromeda is often depicted (particularly in fanart) as a redhead to match her sisters as BlondeBrunetteRedhead, even though canon states she has brown hair and looks remarkably like Bellatrix.
** On the more plausible side, since Bellatrix has the same black hair as her cousins, while Narcissa is blonde and Andromeda is somewhere in between with light brown hair, it's commonly assumed that their father had black hair and their mother was blonde.
* Harry, Ron and Hermione are almost always collectively known as either "The Golden Trio" or "The Gryffindor Trio." Neither name ever appears in the books.
** In next-gen fanfics, Albus Potter, Rose Weasley and Scorpius Malfoy usually form "The Silver Trio," as fanfic authors seem to take it for granted that the three would form a trio much like Harry, Ron and Hermione did, and that Rose and Scorpius would end up dating.
** Also in next-gen fanfics, Rose is very often in Ravenclaw and Albus in Slytherin (based on his conversation with Harry at the end of the book.) The second Lily Potter is sometimes a Slytherin as well. A large number of fanworks portray Rose as looking like a red-haired version of Hermione, even though red hair is a recessive gene.
* On a similar note, in fics Hermione pretty much always calls Ron by [[FullNameUltimatum the name "Ronald"]] when he bothers her, when in fact in the books she never called him anything but "Ron" even when she was furious at him, and the only person who ever did call him that was his mother. This is more than likely the result of a general trope of mature love interests doing that sort of thing being applied to Harry Potter, despite it never really happening in the books.
* Voldemort being unable to love due to being conceived under the affects of a love potion. Many take WordOfGod on the subject and miss the fact that it was merely symbolic.
-->'''Rowling''': It was a symbolic way of showing that he came from a loveless union – but of course, everything would have changed if Merope had survived and raised him herself and loved him.
* The books depict one Yule Ball, which specifically occurs in conjunction with the Triwizard Tournament. However, {{High School Dance}}s are good for fanfiction, so why not depict Hogwarts throwing its own every year?
* A lot of fanfics describe Dumbledore as the defender of the light.
* The abuse the Dursleys heap on Harry is often very exaggerated. Unintentional mistakes are that they regularly starved Harry (according to the first book they didn't, though they did remedy this at the start of the second book) and that there are numerous locks at his door. The latter is truth in the movies, but in the book George and Fred are able to leave Harry's room and fetch his trunk by using a simple hairpin. Also the bars on Harry's window keep popping up during his later school years even though they got removed during Harry's rescue. There's also the persistent claim that they get money for taking care of Harry which they spend on Dudley.
** In the UK, parents and guardians actually do receive money for the children they take care of, so in all likelihood the Dursleys did receive Child Benefits for the presence of Harry in their house. And given established facts about the Dursleys, they probably did spend it all on Dudley.
* A lot of Fanfics claim that Molly and/or Arthur knew the Potters or were somehow friends with them, even though the books say the exact opposite. For starters, all the people who knew Lily and James tend to recognize Harry immediately, because he looks so similar to James (and has Lily's eyes), but Molly and Arthur don't. They are so much older than the Potters that they were certainly not at Hogwarts when they were (Molly explicitly states that the whomping willow was planted after she left). It's also explicitly stated that they weren't part of the Order of the Phoenix the first time around (considering that nearly all their children were born during the war they had really good reasons not to be). Molly's brothers were, but they would hardly introduce the members of a secret organization to their family.
* Apparently the gold in Harry's vault isn't enough for a lot of fans, since it's often claimed to be just a "trust fund". There's at least another vault with a lot of family heirlooms. And multiple houses, which often come complete with house elves (why the Potters go to Godric's Hollow instead of an ancient manor with nearly unbreakable wards is rarely ever explained, though).
** Quite often, it's [[RonTheDeathEater Dumbledore's doing]].
* The Wizengamot is commonly portrayed as a legislative body, usually with hereditary seats, even though in the books, it's never even implied to be anything more than Wizarding Britain's top court.
** Reading with a knowledge of how the UK's government actually works, the books seem to imply that there is no specific wizard legislative body. So logically Parliament is in charge, and the Minister of Magic, if he's a 'Minister', should be a member of Parliament. However, fanon is having no truck with this, because it is completely counter to how the Minister of Magic is shown interacting with the Prime Minister.
* The Astronomy Tower is often portrayed as the go-to location for after-hours romantic activity, ignoring the fact that it's the one place in the entire school where class is held at night, and ignoring the fact that the entire school is a maze of secret passages and rooms where it would be fairly easy to find a secluded place that isn't on top of a freezing cold tower.
** It's especially bad since we've stumbled across students making out in secret passages in the books, like Ginny and Dean. And Percy and Penny were implicitly making out somewhere in the dungeons in Chamber of Secrets right before Harry and Ron ran across them. And secret potions get made in bathrooms, and Triwiz training takes place in unoccupied classrooms. (Not including the Room of Requirement, but admittedly few people know of that.) The ''entire series'' is a string of people hiding ''inside'' the castle to do things out of sight, and yet fanon keeps putting couples on the Astronomy Tower.
* The idea of custom wands, that somehow if there isn't a ''single'' wand that is compatible with a wizard/witch, wandmakers will create a custom wand that suits them perfectly. Usually, if the customer is Harry, then his canonical phoenix holly wand is the result of manipulation by Dumbledore, or to prove he's more powerful than he should be. This obviously ignores rule #1 of wandlore: The wand chooses the wizard. If a wand suited perfectly for a wizard could be made, then they would just make them, not go through hundreds finding a wand that likes them.
* Traditional (pureblood) wizards celebrate Celtic holidays like Samhain and Beltain and the war is as much a religious war (with purebloods blaming muggleborns for destroying their religion and traditions) as it is about blood-purity.
* The Potter will (or wills if Lily had her own) with the obligatory endless list of wizarding guardians for Harry and the injunction that Harry must never be placed with the Dursleys. This also includes the idea that Dumbledore has obviously suppressed the will (or wills) for his own [[RonTheDeathEater nefarious]] reasons.
* Sickles and Galleons being made out of pure gold or silver, despite the official conversion rate for pounds and galleons working out such that someone could just keep converting pounds to wizarding coins, melting those coins for their precious metals, and buying more pounds than one started with.

!!Memes
* "[[MamaBear Not my daughter]], you [[PrecisionFStrike bit]][[ThisIsForEmphasisBitch ch]]!"
* Sirius Black and Remus Lupin: [[HoYay Theirloveissocanon]]!
* Killed By A Curtain
** related: Death By Curtain
* [[spoiler: [[ItWasHisSled Snape kills Dumbledore]]!]]
** [[BigNo Nooooo!]] You bitch! [[ThisIsForEmphasisBitch YOU BITCH!]]
* PotterPuppetPals videos, especially The Mysterious Ticking Noise.
** Snape. Snape. Severus Snape. DUMBLEDORE! (When Creator/AlanRickman turned up at the Deathly Hallows Part 2 premiere in Trafalgar Square, the crowd behind him were audibly chanting "Snape, Snape, Severus Snape!" Awesome.)
*** Heeeeeerrrrrrrrmione!
** ''Bother, bother, bother, bother!''
** ''[[NakedPeopleAreFunny NAKED TIME!]]''
** [[EarWorm Ahhh!]]
** I am Snape, the potions master.
* [[spoiler: [[InternetBackdraft ALBUS SEVERUS]]]] POTTER?!
** AS/S
* [[spoiler: Hedwig]] is not dead. [[PaniPoniDash Dot com.]] Can be found [[http://hedwigisnotdead.com/ here]].
* ''Republicans for Voldemort''.
** Alternatively, ''Democrats for Dolores''.
* [[MemeticBadass Neville uses Nagini's blood as soy sauce.]]
** And he will reject your bribes and [[Awesome/HarryPotter kill your pets.]]
** Neville would have done it in four books.
** What happens when you break an unbreakable vow? Neville.
** In other words, ever since Neville TookALevelInBadass in ''Deathly Hallows'', fans were quick to make him a MemeticBadass of Creator/ChuckNorris levels.
* "''Anvil-sized,''" "''delusional,''" and the coming of [[TheEndOfTheWorldAsWeKnowIt Potterdammerung]], thanks to what is known as simply [[http://wiki.fandomwank.com/index.php/THE_INTERVIEW THE INTERVIEW]].
* "My name is [insert character name here]. You thought I was dead. You were wrong."
* Constant VIGILANCE!
* Draco Malfoy, the Amazing Bouncing Ferret!
** My father will hear about this!
* "I found a page called TVTropes!" [[AccidentalInnuendo ejaculated]] Harry.
* A large amount of fictional characters who are young Indian women tend to be named either "Padma" or "Parvati". Neither name is exactly uncommon, but one has to [[ShoutOut wonder]].
* "I want a taco. You know who can't have a taco? [[spoiler:Cedric]]. BECAUSE HE'S DEAD. *tear*"
* Awkward!Hugs from Voldemort!
* [[LargeHam NYYYEEEEEEEEEEEAAAAAAAAA!]]
** NYE-HE-HEH!
* Harry Potter: [[Website/{{Tumblr}} The Boy Who Cockblocked]]. [[note]]Tumblr joke about Harry being a MomentKiller / ThirdWheel during Ron / Hermione scenes, to the point that he's physically compelled to cockblock them or other couples..[[/note]]
* Dobby never meant to kill. Only... maim. Or seriously injure.
* JK Trolling.
* "Ten points for/from [insert House here]."[[note]]With [[{{Jerkass}} Snape]] often being shown doing these, the awarded House is always Slytherin, and the penalized House always Gryffindor.
* [[spoiler: FRED'S DEAD!!!]]
* "Yer an X, Harry." "I'm a what?"
* [[IncrediblyLamePun Why so Sirius]]?
** "Sirius is dead!" "Are you serious?" "No, can't you listen? Sirius is dead!"
** "Harry, I'm a werewolf." "Are you fucking serious?" "[[SlashFic Yes, that too.]]"
* "No post on Sundays!"
* Anything to do with the flying car.
* EXPELLIARMUS!
* Wingardium Leviosaaa!
** [[InsufferableGenius It's Levi-OH-sa, not Leviosar.]]
* Hello beautiful.
* [[Fanfic/MyImmortal].
* How dare you stand where he stood!
* [[AVeryPotterMusical WHAT THE DEVIL IS GOING ON HEEREEE]]

!!FanNickname
* Kreacher is sometimes called "Kreature", either by accident or to highlight Kreacher being an asshole (he was brainwashed severely by Sirius' utterly insane and racist mom).
** "Kreature" may also stem from the French translation where Kreacher is, in fact, called Kreattur. In the movies, Kreattur is pronunced like "Créature".
* Peter Pettigrew a.k.a. [[spoiler:Wormtail]] is often called "rat bastard", because he [[spoiler:betrayed the Potters to Voldemort and has the ability to [[VoluntaryShapeshifting shapeshift into a rat]] (most likely a pun at him being a snitch ("rat"))]].
* The "Daily Prophet" is sometimes called "Daily Propaganda" or "Daily Pravda" for being a horrible sensationalist rag and the mouthpiece of the Ministry of Magic.
* "Offense against the Dark Arts" as opposed to "Defense against the Dark Arts".
* Sirius Black is sometimes called [[spoiler: "dogfather", a reference to him being Harry's godfather and being able to [[VoluntaryShapeshifting shapeshift into a large black dog]].]]
** There's also a running gag about him being called or he calling himself "son of a bitch", since he's able to [[VoluntaryShapeshifting shapeshift into a large black dog]] and his mother was a ''very'' awful woman. Some fanfic authors give him the middle name "Orion", so his initials become S.O.B.
* Dumbledore is occasionally called Dumbles, Dumb-as-a-door, Dumbledork, Dumbledoor, Headbastard, the Bumblebee, the white bumblebee, Bumblewhore, the Spider, [[RonTheDeathEater the Dark Lord Dumbledore, the Light Lord]], Dumb-Old-Bore, Dumb-to-the-core, Bumblemore, Bumblebore, Dumblewhore, Dumbfuck, Dumblefuck, [[MadMagazine Doubledork]], Dumbledoof (German for "Dumbledumb") or "M.O.B" (abbreviation for "manipulative old bastard").
* The Order of the Phoenix, a paramilitary magic organization established by the above-mentioned wizard Dumbledore to combat the wizard mentioned below, Voldemort, is sometimes called "Order of the Fried Chicken", "Order of the Hogwarts Fried Chicken", "Order of the Useless Phoenix", "Order of the Kentucky Fried Chicken", "Order of the Roasted Turkeys", "Order of the Flaming Flamingos" or "Order of the Ruptured Duck" for being not proactive enough in the eyes of {{fanfic}} authors and fans against the Death Eaters.
* Voldy, Voldypants, Moldywarts, Moldyshorts, Voldilocks, Voldemerde, Voldemrot, No-Nose, Snakeface, Tommy-boy, Snake-Ass, Voldemart, TomTheDarkLord, Tom-Tom, Tomcat, Peeping Tom, The Dork Lord, Dark Putz, The Dark Wanker, Voldewerk, Voldewank, Voldewitch, Voldewhatever, [[MadMagazine Lord Druckermort]], Wind of Death, The Lord of Farts, Voldemonkey, VD-Mort, The Noseless One, You-No-Clue, Heartless Bastard, Lord Voldipants, Lord Thingy, [=DorkLard=] Moldywart, Baldemort, Morty for [[BigBad Lord Voldemort/Tom Riddle]]. In ''Deathly Hallows,'' Peeves the Poltergeist actually uses the first, and Moldyshorts came from a parody sketch on ''Series/AllThat''.
* Voldy-Vision: the occasional visions of Voldemort Harry gets through his scar connection. Often plot-convenient, especially in ''Deathly Hallows''.
* Vapormort is used to refer to Voldemort when he was "less than a ghost". Quirrellmort is Quirrell possessed by Voldemort as well as pairing that soared in popularity after the release of AVeryPotterMusical.
* The Ministry of Morons = [[ObstructiveBureaucrat The Ministry of Magic]].
* "Shit Eaters", "Death Nibblers", "Death Munchers", "Corpse Crunchers", "Dung Eaters" or "Death Wankers" for the [[ANaziByAnyOtherName Death Eaters]].
* CAPSLOCK!HARRY for Harry's shouty moments in ''Order of the Phoenix''.
* Umbridge is sometimes called "Umbitch" or "Dumbitch", because of how evil she is.
* The AlternateDVDCommentary [[http://wayback.archive.org/web/20120331172950/http://illegal-art.org/video/wizard.html Wizard People, Dear Reader]] provided several nicknames that have caught on with the fans. A few of the more hilarious examples:
** Ronnie the Bear for Ron Weasley.
** Hardcastle [=McCormick=] for Prof. [=McGonagall=].
** Ragtime Roast-Beefy O'Weefy for Dudley Dursley.
** The Bloody Eyed Cat and her manservant Dazzler for Mrs. Norris and Argus Filch.
** Catface Meowmers for Madam Hooch.
* The Marauders, aka MWPP - James, Sirius, Remus and Peter (after the Marauder's Map). JKR even started using this after the fandom did.
* The Trio/The Golden Trio - Harry, Hermione and Ron.
** "Secondary Trio" or "Silver Trio" for Ginny, Neville and Luna.
** In [[http://www.youtube.com/watch?v=jnULlBBP9BY this interview]], Creator/JKRowling says she has privately used the term "The Big Seven" to refer Harry, Ron, Hermione, Ginny, Neville, Luna, and Malfoy. So... "Creator Nickname"?
* OBHWF - stands for One Big Happy Weasley Family, meaning...[[CaptainObvious the big, happy, Weasley family.]]
** Or more specifically, the idea, eventually made canon, that [[spoiler: Hermione would marry Ron and Harry would marry Ginny, thus integrating the whole main cast into said family]].
* [[spoiler: Harrycrux - The (now confirmed) theory that Harry is an accidental Horcrux.]]
* Ho!mione or Whoremione - The [[PossessionSue Mary Sue version]] of Hermione with [[SheIsAllGrownUp "curves in the right places"]], found in badfics. There's also "Ho!rry" and [[spoiler:Whorecrux]] for slutty fanfic versions of Harry.
* Ginny Jo Sue - the Ginny seen in books 5, 6 and 7, after she underwent a rather dramatic change of character that led to accusations by some of her being a MarySue. She's also known as Sassy!Ginny or Ginny II. Anti-fans who dislike the character may refer to her as "Gin-bot," "Gin-slut," "Snogdoll" or, interestingly, "Jenny" (after a typo in a German news article).
** [[Film/ForrestGump His girlfriend, Jenny,]] [[Music/WeirdAlYankovic was kind of a slut]].
** Some call her Minny.
* Slytherin Prince/Slytherin Sex God - a fairly idealistic (or {{ironic|Nickname}}) nickname for Draco Malfoy.
** The term "Draco in Leather Pants" used to be used similarly, but this usage has declined, probably at least partially because [[DracoInLeatherPants it was adopted as a trope name by this very website]].
* Worthless Canon Brats - [[spoiler: Teddy Lupin and the respective Potter, Weasley and Malfoy children who appear in the epilogue. For obvious reasons, used by people who hated the epilogue and/or the canon ships.]]
* Moonstruck: Harry/Lupin fanfics.
** Puppy Love or Wolfstar for Sirius/Lupin fanics.
** Wotcher Wolfie for Lupin/Tonks.
** Gin and Tonic for Ginny/Tom Riddle.
** The Government Stole My Toad for Luna/Neville.
** Guns 'n' Handcuffs for Harry/Draco.
** Orange Crush for Harry/Ginny.
** Harmony or Pumpkin Pie for Harry/Hermione, the latter based on a fanfic where they kiss and Hermione notes that Harry tastes of pumpkin pie.
** Fire and Ice for Draco/Ginny.
** The Good Ship for Ron/Hermione.
** Lunar Harmony for Harry/Hermione/Luna.
* House Sparklypoo - The fifth House where {{Mary Sue}}s belong. [[http://piratemonkeysinc.com/ms2.htm Showed up]] in a one-shot FanWebComic and the name stuck. On Livejournal, user Pottersues came up with three more Houses for different types of Sue: Bitchiwitch (JerkSue), Tootsitramp ([[ReallyGetsAround slutty Sue]]) and [[CanonDefilement Qanonreip]] (Sues that ignore {{Canon}} depictions of character, and often add random elements from other fantasy series - "ooh, it's Professor [[Franchise/TheLordOfTheRings Legolas]], isn't he cute?").
* Dumbledore Explains It All - the inevitable post-climax InfoDump from everyone's favourite EccentricMentor. He even manages to give one in the final book, despite [[spoiler:being dead]]. (named after 90s teen sitcom ''Series/ClarissaExplainsItAll'').
* The Three-Year Summer: the gap between the publication of ''Literature/HarryPotterAndTheGobletOfFire'' (July 2000) and ''Literature/HarryPotterAndTheOrderOfThePhoenix'' (June 2003). Saw the growth of the Internet community, the rise of Pottermania to stratospheric levels, and a degree of CreatorBreakdown?
* AK-666: The [[http://harrypotter.wikia.com/wiki/Killing_Curse Killing Curse, a.k.a. Avada Kedavara]], after the [[http://en.wikipedia.org/wiki/AK-47#Cultural_influence famous AK-47 assault rifle]].
* The Potterdämmerung: The release of ''Literature/HarryPotterAndTheDeathlyHallows'', and the anticipated and actual InternetBackdraft resulting.
** See also the Harry Potter Summer, aka the summer of 2007, when both ''Deathly Hallows'' and the film of ''Order of the Phoenix'' were released within two weeks of each other.
* Harmonians (or Harmoanians): derogatory term for Harry/Hermione shippers, anecdotally the most unhinged people/designated whipping boys in the fandom. Certainly only the more radical shippers would keep going past getting {{Jossed}}.
** The stereotypical hardcore Harmonian is defined by the following traits. They believe the series was ruined because Harry and Hermione didn't end up together. They think Hermione is too good for that dumbass Ron, engendering the hatred of Ron fans everywhere. They don't think Harry is quite good enough for that perfect goddess Hermione either, but he's the closest anyone could come since he's TheHero. They believe that Harry and Hermione's love so purely transcends base lust that it's evidenced by the very lack of any evidence. It's frequently assumed that Harmonians are either misguided feminists who see themselves as Hermione (if female) or fanboys who want to get in EmmaWatson's pants (if male).
*** Occasionally reappropriated by those, who approve of this pairing.
* [=McGoogle=]/Preacher [=McGongle=] for [=McGonagall=], Dumbly, Voldemint, Snap, Loopin, Lucien, Serious Blak etc. - all from ''FanFic/MyImmortal''
* The Yule Brawl for the giant fight in Book IV after the Yule Ball, [[JustForPun for the pun]].
* ''[[VideoGame/GearsOfWar Gears of Hogwarts]]'': The ''[[VideoGame/HarryPotter Deathly Hallows]]'' game, after a trailer depicting it as something very much resembling a ThirdPersonShooter.
* The pimp cane: The snake-headed walking stick used by Lucius Malfoy in the movies (it's never been mentioned in the books).
** It's also called Snakey.
* [[MightyMorphinPowerRangers Pink Power Granger]]: Hermione as seen in the third film, in which she wore a pink hoodie during the climax.
* The "[[http://harrypotter.wikia.com/wiki/Blood_quill blood quill]]": The bloodletting quill (a quill, that doesn't use normal ink, but the writer's own blood as an ink-replacement. The text written with this quill also appears in form of scars on the back of the writer's hand) which Umbridge forces Harry to write "I must not tell lies" with in the fifth book, due to the lack of any canon name.
** Blood Quills were never shown as illegal in Canon... though they probably were (since corporal punishment was outlawed, much to Filch's dismay).
* [[TheScottishTrope The Scottish Book]]: Refers to Rowling mentioning that she might publish an "encyclopaedia" of the Potter universe, including information that didn't fit in to the books. Now looks less likely with the advent of the Pottermore website.
* The First Wizarding War and the Second Wizarding War: The wars against Voldemort, again due to the lack of canon names. The First Wizarding War is the war which occurred in the BackStory and ended when Voldemort failed to kill Harry as a baby. The Second Wizarding War is the war which occurs during the series, starting in ''[[Literature/HarryPotterAndTheGobletOfFire Goblet of Fire]]'' and ending in ''[[Literature/HarryPotterAndTheDeathlyHallows Deathly Hallows]]''. Often Wiz War 1/2.
** Sometimes also known as Vold War I and Vold War II.
* After the release of the final film, Professor [=McBadass=] has become quite popular for Professor [=McGonagall=].
* Slytherfen: derogatory term for fans who think the Slytherins aren't as bad as the narrative voice paints them (especially when compared to the actions of the main characters).
** There's also "Snapefen" for fans who are excessively devoted to Snape and paint him as the most important and/or worthwhile character in the series.
* "[[AdolfHitler Wizard Hitler"/"Magic Hitler"/"Magical Hitler]]": Voldemort, for [[ANaziByAnyOtherName rather obvious reasons]].
** The comparison of Gellert Grindelwald to Hitler [[http://harrypotter.wikia.com/wiki/Gellert_Grindelwald#Behind_the_scenes seems also to hold water and is apparently very much intentional]]. In more than one fanfic, his name is mentioned together with Hitler and other muggle dictators.
* Durzkaban or Durskaban: the treatment Harry receives from [[AbusiveParents his relatives]].
* More Harry Potter fanon can be found [[http://www.sugarquill.net/read.php?storyid=656&chapno=1 here]].

!!Common FanficTropes and Occurences
* See also: FandomSpecificPlot.HarryPotter