a flight of fancy

flight of fancy

An imaginative but unrealistic idea. No one took his campaign for office seriously because his proposed solutions to problems were filled with flights of fancy.
See also: fancy, flight, of

a flight of fancy

or

a flight of fantasy

COMMON If you call an idea, statement, or plan a flight of fancy or a flight of fantasy, you mean that it is imaginative but not at all practical. This is no flight of fancy. The prototype is already flying, and production is to begin next year. The idea that you could use these satellites as weapons is a complete flight of fantasy.
See also: fancy, flight, of

a ˌflight of ˈfancy

an idea or a statement that is very imaginative but not practical or sensible: The idea is not just a flight of fancy. It has been done before.
See also: fancy, flight, of
References in classic literature ?
I answered, smiling; and then, with rather a flight of fancy, "It's the idea of a garden in the middle of the sea.
It was, in truth, as impossible for him to take a flight of fancy as it would be for a watchmaker to put together a chronometer with nothing except a two-pound hammer and a whip-saw in the way of tools.
BIRMINGHAM art lovers are invited to go on a flight of fancy.