It could mean a fan - created fictional story where Harry has some form of possession related to Lily. Maybe it's a magical possession in the context of the Harry Potter universe, like he has an object that belonged to Lily or some special connection to her.
It could mean that in a fanfic (fan fiction), Lily (presumably Harry Potter's mother Lily Potter) is depicted as disowning Harry. This might be a very unorthodox or dark take on the Harry Potter story, as in the original canon, Lily sacrificed herself to protect Harry.
I'm not sure specifically about 'harry possesses lily' fanfics being extremely popular. There are so many fanfics out there that it's hard to single out ones with this exact concept as being widely known. However, some niche fanfic communities might have some interesting takes on it.
It might mean that in the fan - made stories about Harry and Lily Lemon, Harry is the more prominent figure. He could be the one driving the plot, making the important decisions, or overshadowing Lily Lemon in some way. For example, he might be the hero who saves the day while Lily Lemon is more of a side character that he helps or protects.
I'm not sure who Rotem is in this context. But possessing a sex toy fanfiction might imply that Rotem has a piece of fan - created fictional writing related to sex toys. However, this is a rather unusual and potentially inappropriate topic.
Well, 'harry is not bwl fanfic' might imply that Harry has no interest in the fanfic that is centered around 'bwl'. 'bwl' could be a unique term, perhaps a story arc, a magical item, or a group in a Harry Potter - like fanfic world. Since he's not a fan, he might find the plot, the characters related to 'bwl' unappealing or not in line with his own views or interests.
The term 'fanfic' stands for fan fiction, which is a fictional story written by fans. However, using the term'slut' to describe a character named Harry in this context is inappropriate and disrespectful. It might imply some sort of misrepresentation or negative portrayal of this character in the fan - created story.
BDSM in fanfic refers to a genre that involves elements like bondage, discipline, dominance, submission, sadism, and masochism. If Harry is into BDSM fanfic, it means he has an interest in this particular genre of fan - created fictional works. It could be that he is intrigued by the power dynamics, the complex relationships, or the unique scenarios often portrayed in such fanfics.
It could potentially mean that in a fan - created fictional work related to 'Harry' (perhaps Harry Potter, but not necessarily), there are elements where the character named Harry is depicted as being abusive. However, without more context, it's hard to be certain.
It means that Harry has a negative attitude towards fanfic. Fanfic is fan - written fiction based on existing works. Harry might refuse it because he values the integrity of the original work. He could also be worried about legal issues associated with fanfic, such as copyright infringement. Additionally, he may not like the idea of others taking creative liberties with something he is associated with.
I don't know what 'Lily's novel' means. If you can provide more information or context, I will try my best to answer your questions.