Fan fiction (alternately referred to as fanfiction, fanfic, FF, or fic) is a broadly-defined term for fan labor regarding stories about characters or settings written by fans of the original work, rather than by the original creator. Works of fan fiction are rarely commissioned or authorized by the original work's owner, creator, or publisher; also, they are almost never professionally published.
So I've decided to claim all of my blogs I follow as my fanfic (I know, I cheated again). I love finding new and interesting blogs from other people's blogs all the time. You read about their every day life and you start to feel like you know them personally. It's like a whole little world of imaginary friends :)