A Drabble is a short fanfiction constrained to exactly 100 words (though some say "as long as it's short"). Drabbles are usually written by authors as a writing exercise to write the best piece in the given size and is often simply a short scene or idea. A Drabble is not necessarily a joke; however, given the limitations, serious efforts tend toward oneshots rather than fully-fleshed narratives. These may also be called "micro-fics", "nano-fics" or "flash fics"; those terms can be applied to any very short story, and are not constrained by the 100 word limit.