Crackfic, also known as crack-fic or crack!fic, is a story intended to push the boundaries of canonical reality. Crack fics are not merely humorous; In fact, in many cases it doesn't have to be humorous. While it is similar to Alternate Universe Fic, in that they both change some fundamental aspect of the source material, the "something's different about this" idea taken to the extreme. In its broadest sense, crack fic is any story whose premise and events would be completely implausible in Canon. These frequently push the boundaries of canonical reality. It might involve bizarre pairings, out-of-this-world plots, oddball crossovers, or even merely pure nonsense.