Hagakure: Now, I'm not saying it was Junko, but it was Junko.
Discredited Meme: However, people eventually grew tired of it, since it was used increasingly near the end of the LP, whether seriously or jokingly as it became increasingly likely, and had gotten stale. The LP thread of the sequel now bans anyone referencing it.
It gets better: even though the LP of Super Dangan Ronpa 2 is banning any references to the meme the game ends up referencing it instead since the Big Bad of the game is an AI based on Junko whose goal is to upload herself into the bodies of all the deceased students after the survivors "graduate" and ultimately take over the world by turning everyone into JUNKOS. Yes even after Junko died (for real this time) they STILL managed to be behind everything, and making others act as her doppelgangers is STILL the punch line of this joke. Bonus points since the name of her backup twin means "Corpse" and now she's using literal corpses to preform essentially the same purpose.
Speaking of Togami, some people joke that tampering with crime scenes is a favorite hobby of his, given the events of Chapter 2.
"Tell them, Naegi" Explanation It's also a common joke to have Togami about to say something to the cast, only to turn to Naegi and say, "Tell them, Naegi," given his tendency to make the player do all the work actually answering questions in the various cases despite very likely having every idea what the answers are.
"Togami, you've lost weight." Explanation (spoilers) In certain roleplays/fanfics, the students from Super Dangan Ronpa 2 react to the original Byakuya Togami this way (like Akane did in the actual game), to his bafflement. In the case that Twogami is alive, however, there's often much competition between the two about who is the real Byakuya Togami.
Who's Togami? That's Nigel. Explanation From a meme where someone on Tumblr had their father react to Dangan Ronpa characters with no context. He nicknamed Togami 'Nigel', and claimed that you couldn't trust Nigel (who has a summer home in Prague that he rubs into everyone's faces.)
Four-eyed lemon Explanation Asahina's insult towards Togami in the Project Zetsubou translation has become very popular, to the point where its practically his Fan Nickname.
"My name is Byakuya Togami." Explanation Togami's answer to how he could participate in the stock market despite being underage. Fans expanded it to be a catch-all answer to everything, implying he's arrogant enough to believe his mere identity is enough of an explanation for any question he's asked.
If you have an ahoge, you're the protagonist. Explanation All protagonists of Dangan Ronpa games so far (Naegi Makoto, Hinata Hajime, and Naegi Komaru) have had ahoges, even in the case where Komaru had no ahoge until she became the protagonist.
FUCK DA POLICE. Explanation From a particularly infamous video featuring Dangan Ronpa sprites set to audio from John Mulaney's "Why I Don't Drink Anymore," starring Hinata as Mulaney recalling a wild high school party.
GET THE PADDY WAGON. Explanation Same video as above, although this one references Ishimaru's role in the video as the police officer.
Making sprite videos in general is a meme on it's own, taking sprites and setting them to either comedy routines, as shown above, songs, viral videos, and even TV/movie clips (spoilers on the latter two)
"Upupupu..." Explanation Monokuma's trademark laugh in Japanese.
"Puhuhu..." Explanation It's English dub counterpart.
Shortly after the big reveal, we get a memetic gif◊ where the Big Bad's head is sent spinning. People then added sounds and musical accompaniment.
In one scene where Naegi looks horrifically at a TV screen showing the outside world, people pasted several different pictures on the TV screen, such as something else that is horrifying or a Take That. Something Awful's paywall screen is a popular choice.
"YOU GOT THAT WRONG!" Explanation Naegi's catchphrase in trials, used to shoot down other students' arguments.
"YOU MUST NOT LOSE HOPE!" Explanation Naegi changes his catchphrase to this in the final trial.
"I KINDA DOUBT THAT!" Explanation A mock translation of "YOU GOT THAT WRONG!" by slowbeef in SomethingAwful thread.
"THIS GIRL IS ON FIREEEEE!!!" Explanation (spoilers) A reference to Celes' execution.
Also: I'd hit that with a truck.
Due to Naegi's status as Super High School Level Hope, he is often depicted cosplaying as Madoka; sometimes, Kirigiri is drawn alongside him as Homura. Sayaka Maizono sometimes joins them, as she has a matching first name and color scheme.
"Owada pumped up and ready to party." Explanation A description of Owada's sauna scene. Can be replaced with any other character.
11037 Explanation (spoilers) One of the clues in the first case, which particularly amused the English-language fandom, because they could tell much earlier than most of the characters that it was a misreading of a character's name written in English, albeit upside down and backwards.
Leon Kuwata is a weenie.
A weenie who hates besbaw.
Batter up, Leon. Explanation His execution is very memorable among the fandom for giving players a taste of what the series has in store. In fact, it's so memorable and talked about, it's practically a Late-Arrival Spoiler.
AHO AHO AHO AHO AHO AHO AHO Explanation (spoilers) His Freak Out in Chapter 1.
Ishimaru is a crybaby. Explanation (spoilers) Both Kuwata and Ishimaru are given Butt Monkey status due to their very negative reactions in the trials of Sayaka Maizono, and Chihiro Fujisaki respectively.
SakuraOogami is a pretty princess. Explanation Due to her overall kind nature, Oogami is often seen as the most adorable of all the girls.
I can't believe it's not butter. Explanation (spoilers) Oowada Mondo is turned into butter in his execution, which Monokuma then eats, leading to Mondo butter becoming memetic.
Eatup, aniki. Explanation (spoilers) From a fan artist on deviantArt, who drew vore/inflation art of Ishimaru and Mondo. It was later referenced by a number of fan fictions.
The culprit is Hagakure! Explanation (spoilers) Often on the Something Awful LP thread, it was guessed that Hagakure would be the culprit. He never was, ultimately.
DONUTSExplanation Asahina Aoi is infamous for having donuts as her favorite food, leading to many claiming she has an obsession with them.
Also, because the anime adaptation was running at the same time as Free!, jokes were made that Aoi was in the wrong series, and she was even shipped with series lead HarukaNanase.
Kyouko Kirigiri loves touching corpses.Explanation While Naegi expresses hesitation in examining victim's bodies during the game, Kirigiri has no such hesitation and examines the corpses without flinching.
Bacon HandsExplanation Used to refer to Kirigiri and coined by 4chan's /a/ board. It alludes to their injured hands, which she burned in her early days as a detective
Ramenhead!Kirigiri, the Ramen Fairy, or Naegi's ramen fetish. Explanation After the 5th trial ends with Naegi taking the fallKirigiri goes looking for him in the dumpster and when she finds Naegi she has a cup of ramen on her head.
Super Dangan Ronpa 2 Memes:
AVRIL LAVIGNE. Explanation (spoilers) With Monomi acting as Hanamura's translator during the first trial of Super Dangan Ronpa 2 due to his strong southern dialect that comes out when nervous, she eventually translates one string of words as Avril Lavigne, leading to Avril Lavigne being considered either Monomi or Hanamura's favorite singer.
YOUMUSTNOT LOSEHOPE, HINATA-KUN. Explanation Komaeda is particularly memetic for his obsession over hope.
Here we are at Seaworld, Hinata-kun! Explanation The first line of a Youtube video of a reading of a trollfic about HinataandKomaeda going to Sea World.
Did somebody say HOPE?!/Haha Time for HOPE Explanation Whenever anybody says the word hope in a Dangan Ronpa thread they are always responded with a picture of Komaeda and this video plus either of those phrases
Ibuki knows that you're reading this! Don't say anything bad about Ibuki! Explanation Ibuki is seen as a character easily able to break the fourth wall, leading to fanworks with her befriending similar-fourth-wall-breaking characters like Pinkie Pie and Deadpool.
Ibuki's song from Chapter 3. Treads into Accidental Nightmare Fuel territory, and also gives an insight on why she broke up with her band over creative disputes, as stated in her Free-Time events.
Hajime Hinata loves orange juice. Explanation Similar to Hagakure and his hamburger, This◊ particular screencap from the in-game CGs is notorious, to the point of orange juice being Hinata's favorite drink in fanon.