drabble

Etymology 1
From.

Verb

 * 1)  To wet or dirty, especially by dragging through mud.
 * 2)  To fish with a long line and rod.
 * to drabble for barbels
 * to drabble for barbels

Derived terms

 * drabble-tail

Etymology 2
From a game in 's  in which the first player to write a novel wins; possibly derived in turn from the surname of the author.

Noun

 * 1) A short fictional story, typically in fan fiction, sometimes exactly 100 words long.

Usage notes
The 100 words limit is the original meaning defined by UK science fiction fandom, although in practice it frequently extends up to around 500 words, with a variety of limits used.