* SOON. [[labelnote:Explanation]]Ever since the very first concept art was posted Animation Do's home page, that picture was posted pretty much ''every single day'' (sometimes even multiple times a day) on /a/ for ''over a whole year'' until the first animated commercial happened. The picture was always posted together with only one word - "SOON".[[/labelnote]]
* Makoto's shovel.
* Rin's [[SlasherSmile shark teeth.]]
* The show called "the fastest growing tumblr fandom".
* In addition to the nickname "Swimming Anime", there's also "Swimming [[YaoiGuys Yaoi]]" due to the [[HoYay presumed]] homoeroticism the show will have.
** Other nicknames include "Swimbros" and "Boku no Swimbros", the latter being a reference to the infamous (not to mention Memetic) Shotacon hentai series Boku no Pico.
* Don't call her Gou/Her name is Kou. [[labelnote:Explanation]]Rin's sister dislikes her masculine-sounding name "'''G'''ou" and prefer the more feminine way her name can be read, "'''K'''ou". So naturally, if someone refers to her as '''G'''ou, it has to be corrected.[[/labelnote]]
** Gou is [[AudienceSurrogate my spirit animal]].
* It's becoming popular for the ''Manga/AttackOnTitan'' fandom to make references to the series, especially cosplayers commenting on how to get [[CrowningMomentOfFunny the fangirls' attention after the Free! cast took it away from them.]]
** Another overlap with the ''Attack on Titan'' memes includes [[http://www.youtube.com/watch?v=tML0GaXxkwA Shingeki no Shitstorm]], a video meant to serve as a TakeThat to the anti-fujoshi {{Hatedom}} that appeared in response to ''Free!'' and its growing fandom of yaoi fangirls.
** Then the [[http://www.youtube.com/watch?v=RKq5CMUQG8I parodies]] of the ending with ''Manga/AttackOnTitan'' [[http://www.youtube.com/watch?v=mbInu28Z9AY characters.]]
** Also the similarities between Eren and Haruka- what with the former being obsessed with killing Titans and the latter with swimming.
* Some people predicting it to have a sudden shift into psychological horror by episode three have taken to calling it "Drowning Anime".
** ...which became hilarious after episode 3 when [[http://sam-littlecookie.tumblr.com/post/55774626096/remeber-this-xd#notes this happened]]
** ...and then horrifying after episode five.
** Related to the 'drowning anime' predictions, many also started guessing that the anime would turn into Anime/PuellaMagiMadokaMagica.
* [[spoiler: Nagisa dies]]. [[labelnote:Explanation with HUGE spoilers for CLANNAD ~After Story~]]A crossover meme with ''VisualNovel/{{CLANNAD}} ~After Story~'', since both shows 1) are made by KyoAni and 2) feature a character named Nagisa, and everybody who watched ''CLANNAD ~After Story~'' knows that, [[KillTheCutie well]]... [[/labelnote]]
* Nagisa does drugs. [[note]]To some, this is the initial reaction to his "purifying salt" from episode 1; since then, the scene has spawned several jokes revolving Nagisa and drugs.[[/note]]
** [[ScaryBlackMan Thugisa.]] [[labelnote:Explanation]][[WebAnimation/FiftyPercentOff 50% Off]] took the above and ran with it.[[/labelnote]]
* Haruka's obsession with water and stripping whenever he sees a pool/Haruka is [=H2Osexual=] [[labelnote: Explanation]]After episode 1, Haruka X Water jokes exploded across the Free!dom, mostly involving Haruka stripping at the mere sight of water, being attracted to water, etc, etc. It only got worse after episode 2 showed him seriously considering ''climbing into a '''fish tank''''' at a hardware store. He admitted that he fell in love with a waterfall when he was younger.[[/labelnote]]
* "When you're ten, they call you a prodigy. When you're fifteen, they call you a genius. Once you hit twenty, you're just an ordinary person." (Repeated on Tumblr ad infinitum)
* Megane Makoto!!! [[note]] Makoto with glasses got ''instantly'' popular after the ED art for episode 4 [[/note]]
* Depicting Rin as being secretly protective of Kou and being angry about her being around a bunch of topless bachelors all the time is quite common amongst fan artists.
* [[http://24.media.tumblr.com/73abcceaa8550abe235a47a3204ccbbd/tumblr_mqfdn31lj41qid3hgo1_500.gif Why the FUCK do you relate this show to ours?]] [[note]]It's a well-known fact that ''Free!'' and ''Manga/AttackOnTitan'' have FriendlyFandoms, and it's also well known that their tones couldn't be more different. The gif was one that made its way around the internet via a tumblr post with the caption, "Nagisa and Makoto watch ''Attack on Titan'' and wonder why the FUCK you relate this show to theirs."[[/note]]
* Rin's UsefulNotes/AustralianAccent [[note]]Considering that Rin lived in Australia for approximately three years, it has become very common to depict him with an Australian accent when speaking English in fanworks.[[/note]]
* It's a popular joke amongst the fandom to wonder how Haruka would respond to Disney/TheLittleMermaid. Specifically, how everyone knows he'd be outraged at how [[http://24.media.tumblr.com/38747fcba7829a8d84cbf85f0825e68e/tumblr_mrg0wd130s1sbs8dho4_500.jpg Ariel is willing to give up a life of swimming forever in exchange for human legs.]]
* Depicting Rei as [[spoiler:being dead after the end of episode 5 happened]] became quite popular on tumblr.
* Rin's "boyfriend senses" in regards to him sensing Haru's actions has become quite a thing on Tumblr.
* Nagisa isn't just a shota. [[http://31.media.tumblr.com/33d772e7190763299d780ac6285c5376/tumblr_mpl6ngXO471s03lilo1_500.jpg He's a seme, too.]]
** He's also a little shit. [[note]]The phrase "Nagisa you little shit" is so commonly used on Tumblr, it became its own official [[http://www.tumblr.com/tagged/nagisa-you-little-shit]] tag.[[/note]]
* Some fans noticed [[http://25.media.tumblr.com/f238cf30022b47151d25778ee179da51/tumblr_ms9ut4nEOa1rwbtiuo1_1280.png a resemblance]] between minor character Coach Sasabe and rap artist {{Macklemore}}. As a result it's common to refer to the character as "[[FanNickname swimming Macklemore]]".
* [[http://reapersun.tumblr.com/post/59472979409/3rd-year-nagisas-growth-spurt-for-buddens Growth Spurt!]] [[http://everyredqueen.tumblr.com/post/58285240277/if-you-tell-me-you-dont-want-third-year-nagirei Nagisa]].
* [[http://i.imgur.com/8ShDNVV.jpg Third Year!]] [[http://i2.pixiv.net/img80/img/loyalists/39251428_p7.jpg Nitori]]
* Seijuro Mikoshiba? You mean [[FanNickname Captain Abs]]. Also, his and Gou's [[OneTruePairing "future beautiful red-head babies"]].
* Cop!Rin in the second season ending gyrating his hips. [[http://ksexyncute.tumblr.com/post/90675062052 It's everywhere!]]
** A common conviction on Tumblr is that Rin's specifically a cop-themed ''stripper''. [[SarcasmMode "Rin's a real cop like I'm a jelly donut"]] and similar phrases have become a thing.
* The end of episode 7 introduces Kisumi AKA "[[FanNickname the Strawberry Cotton Candy Kid]]".
** Kiss Me
* "DON'T YOU 'FUTURE FISH' ME!!" and the like became popular after the heartbreaking ending of episode eleven being quickly offset by the inappropriately happy ending song.
* "Saba Down!" Started popping up around Christmas time when fans flooded the Kyoto Animation's shop site, trying to get preorders of the Haruka and Makoto mook, causing the server to crash. [[labelnote:Explanation]] Saba is mackerel in Japanese but it is used as a pun on Saabaa which is server.[[/labelnote]]
* Ever since the OVA [[https://s-media-cache-ak0.pinimg.com/736x/c8/c6/64/c8c664b79df6424108240d4168f05b81.jpg Lost Sousuke]] has become a popular joke. Especially on Tumblr.
* As of the Eternal Summer English dub, there are now jokes making fun of how the characters refer to each other with "dude", "man" and "bro", as well as this line:
-->'''Makoto:''' I've got backstroke for days!
** Rin's name being pronounced as "Reen"