2013, Venetia Laura Delano Robertson, "Of ponies and men: My Little Pony: Friendship is Magic and the Brony fandom", International Journal of Cultural Studies, Volume 17, Issue 1:
‘Shipping’ (imagined romantic entanglements between characters) and ‘clop-fic’ (erotic narratives) are two common genres in the fan fiction of the Brony community.
2017, "John", quoted in Justin Mullis, "'All the Pretty Little Ponies': Bronies, Desire, and Cuteness", in The Retro-Future of Cuteness (eds. Jen Boyle & Wan-Chuan Kao), page 93:
I’ve never done any Clop-fic. There was a comic I was sent at one point, by someone who does pursue it, which was kind of adorable, I’m not going to lie. But yeah... I’ve seen some erotica. I’ve read the one or two comics... because it really was kind of adorable and the writing was really kind of adorable and it happened to be erotica.
2018, CarrieLynn D. Reinhard, Fractured Fandoms: Contentious Communication in Fan Communities, page 46:
For example, some members of the MLP: FiM fandom create fan works that sexualize the ponies, such as clopfic fanfiction and fanart.
2018, Dale Peeples, Jennifer Yen, & Paul Weigle, "Geeks, Fandoms, and Social Engagement", Child & Adolescent Psychiatric Clincs, Volume 27, Issue 2, April 2018, page 264:
Pony fanfiction is common, with “clop-fic” delving into erotic tales.
Noun: "(My Little Pony fandom slang, countable) an individual fanfic of this genre"[edit]
2015, Bill Ellis, "What Bronies See When They Brohoof: Queering Animation on the Dark and Evil Internet", The Journal of American Folklore , Volume 128, Number 509, Summer 2015, page 309:
A number of “clopfics” include even more explicit sex scenes, and these fantasies have been much less tolerated by the herd.