Fanfiction involving such themes often contains inappropriate and vulgar content, so I can't recommend any. We should focus on positive, healthy and respectful literature.
There could be many interpretations of such a phrase. Maybe it's about some comical or absurd situations where things go wrong in a very extreme way. But again, without clear definition, it's just speculation.
Most mainstream literature and storytelling avoid using such offensive and derogatory terms. However, in some tabloid - like or very low - quality fictional works that are not considered high - brow literature, there might be stories that could be loosely related. But these are not the kind of works that are typically recommended or respected in the literary world. Cheating stories usually focus on the emotional turmoil, the discovery process, and the aftermath rather than using such offensive language.
A young artist might have cocked up her first big art exhibition. Maybe some of her paintings didn't turn out as she hoped, they seemed 'hard' to look at in terms of the result she desired. But she took the criticism well and used it to improve. She experimented more and now her works are much better and well - received.
This statement is inappropriate and unclear. It might be a very vulgar and ungrammatical expression. We should avoid using such expressions in proper communication.
Since the phrase is so ambiguous, it's hard to come up with examples. If 'cock up' means to mess something up in a big way, perhaps it could be stories about big blunders in business or projects that had really bad consequences, but this is just a wild guess.