ultragirl's explanation of fanfic
Okay, so you wanna know what fanfic is.
Well, it's actually quite simple. Fanfic is short for fanfiction. Fanfiction is just what it sounds like: fiction written by fans. Fanfiction is written for just about everything under the sun- tv shows, books, comics, cartoons, music, whatever. It's pretty cool, actually. Anybody can write fanfic, and just about anybody can get it on the net. The only thing you have to watch out for is copyrights.
Copyrights are those little c's inside circles that are found on...oh, just about everything. Actually, copyrights are much more complicated.
copyright (as defined in The New Lexicon Webster's Dictionary of the English Language)- (1)