Noun
an interesting but highly implausible story; often told as an excuse
a story about fairies; told to amuse children
Source: WordNetfairy-story
Colloquially, a "fairy tale" or "fairy story" can also mean any far-fetched story or tall tale ; it is used especially of any story that not only is not true, but could not possibly be true. Source: Internet
But since the fairy-story deals with 'marvels,' it cannot tolerate any frame or machinery suggesting that the whole framework in which they occur is a figment or illusion." Source: Internet
In a hundred years time perhaps, Animal Farm may be simply a fairy story, today it is a political satire with a good deal of point." Source: Internet
"It is at any rate essential to a genuine fairy-story, as distinct from the employment of this form for lesser or debased purposes, that it should be presented as 'true.' Source: Internet