The New King of Shōnen! explanationAt the start of the Fall 2017 anime season, both Crunchyroll and Funimation heavily promotedBlack Clover as being their flagship simulcast of the season. Crunchyroll even went as far as to call it the new King of Shonen, a slogan that earned quite a bit of derision and mockery from the anime community, especially after the padding and filler started setting in so early.
Yami is a retired isekai protagonist.explanationA joke between the fandom of the manga where is believed that, much like the stories where a Japanese teenager gets transported to a fantasy world, Yami, who proceeds from the series counterpart of Japan, in his youth got lost and found himself stranded in a place resembling a medieval fantasy world. He then was looked down at first only to rise in power and become one of the strongest people of the country, obtaining (without seeking it) a harem of beautiful girls in the process (including a noblewoman who is considered the most beautiful woman of the kingdom, who is also a tsundere for him), effectively making him a (retired) isekai main character.
Yami is a retired Shōnen protagonist. explanationA similar meme to the one above, where the fandom jokes that, seeing how Yami seems to know about shonen tropes, usually quoting his "surpass your limits" line (as a way to show that he understands how, in a battle shonen, the main characters get stronger in dire situations) as a prime example, he too, is a retired shonen protagonist that came to understand how the shonen genre works (where the manga is placed in) when he was young.
"Surpass your limits!" explanationOne of Yami's most quoted lines in the series. Usually used by the fandom for all kind of situations involving an effort.
"I'm royalty."explanationNoelle's Catchphrase — bringing it up to justify her competence or cold, rude treatment of someone.
Bakasta.explanationThe nickname that Noelle gives Asta for his idiocy, which she constantly calls him.
Asta is a Chad.explanationA variation of the "Chad" meme due to Asta being ripped, physically strong, catching the romantic attraction of beautiful girls, and fighting villains to save the country.
White Clover. explanationA meme originated on Twitter, used by fans of the series against ridiculous or false criticisms about Black Clover, claiming that since those complaints are untrue or void of logic, they are reading a completely different manga called "White Clover", with very different events to the ones of the actual series.
"Sleep with an eye open, Kyle." explanationA Twitter user with a profile picture of Leopold sent Kyle Hooten, a writer for the conservative publication The Daily Caller, the message with a stock photo of black Nike Air Force 1's and a rifle, with Hooten describing it as "Another legally actionable death threat from the good folks over at BLM". Fans on Twitter promptly turned this into a meme.
"Make Nero plush." explanationA complaint that Black Clover has little merchandise, with one of the most desired items being a plush of Nero.
Yuno the vibes.
Noelle is what Sakura should have been. explanationOne of the most common praises of the author, YĆ«ki Tabata, is that he tends to treat his female characters with a lot more respect than other authors in the business by providing them just as much development and screen-time as the men of his series. The most common character people will point to is Noelle given that she's the main girl, and that her development throughout the series has allowed her to keep up with Asta and Yuno. This will often lead to many comparisons with Sakura, who many believe failed miserably at keeping up with Naruto and Sasuke.
Golden Gone.explanationA mocking nickname for the Golden Dawn after half the squad is killed by Zenon and his Dark Disciples.
"Well, if you don't want to be judged by how you look, don't look like that." explanationNacht's words to Grey when she defends the thuggish-looking Magna and Zora as being good people after Nacht bad-mouths them. Some on Twitter joked about his words being too personal.
Asta's butt. explanationIn March 2021, a visual◊ for the upcoming anime movie was released, which shows Asta's well-sculpted butt. Cue several people joking about his bottom.
Noelle's butt. explanationThroughout all her fights with Megicula and Vanica, Noelle's had many butt shots, most glaringly at the end of Chapters 298 and 303, which did not go unnoticed by many.
A Star Is Born. explanationChapter 310 has Yuno's star magic grimoire state that "The stronger the mage, the more stars are born", with fans joking that it is a reference to the film.