Fandom-related simply means that the characters in your drabbles come from some fandom, like Harry, Ron or Hermione from "Harry Potter," or Kirk and Spock from "Star Trek."
Although you can 'flesh out' the drabbles you share here with OCs (Original Characters), they shouldn't be the focus of your effort. (There are communities that focus entirely on non-fandom writing here at LJ, though, so don't despair! If this is what you prefer to read and write, there's a community out there just for you...)
For more information, you might want to check out:
If you have QUESTIONS, feel free to comment to this entry.