Beyond even a lemon on the citrus scale. This is reserved for the lewdest of the lewd fanfics. The kind with fetishes not even DeviantArt would allow. Some
time’s there’s barely even a plot, just nothing but the author’s oddly specific and/or
gross as fuck fetish and copyrighted characters participating in them. You, a
person finding such a fanfic, were either looking for it or you made the mistake of asking for context when somebody joked about the grapefruit.
If you go out and
pick grapefruits, be warned that Rule 36 will be constantly proven to you the hard way.
Bob:
Alice’s Harry Potter grapefruit is something else, man. What perverted mind wants to read about Hermione getting a Manhattan transfer from Luna?
David: A Manhattan what-now?
Bob: You don’t want to know.