a fact that provokes fantasy or is fantastic by itself; a literary or artistic genre that combines complete facticity with unbridled fantasy.
The center of our galaxy tastes like raspberries and smells rum. This factasy is a recent discovery of astronomers.

I am writing a factasy based on recent calculations: each ejaculation contains about 15 terabytes of genetic information transferred at a speed of 5 terabytes per second.
by Mike November 4, 2012
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(n) a fictional work which portrays an elaborate account of a particular historical event or movement in a more or less believable way, but using fictitious source material.
A case can be made for Dan Brown's The Da Vinci Code being the central text of the Factasy genre; however, an equally compelling case can be made for the inclusion of such divergent works as Susanna Clarke's Jonathan Strange and Mr. Norrell
by Tipsy Pipsi April 1, 2011
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