Noun
(countable) A fictional story that is briefer than typical short stories.
Synonyms: drabble, flashfic, short short story, sudden fiction
(uncountable) The genre of such stories.
Synonyms: flashfic, microfiction, sudden fiction
Kwame, who temporarily resides in London, England, won one of three individuals out of 14 who won an award in the Flash Fiction category which includes poetry and short story. Source: Internet
Flash fiction has gained in popularity due to the internet, I think. Source: Internet