blue-sky

(-skī)

adjective

of no value; worthless

Origin: see blue-sky law

See blue-sky in American Heritage Dictionary 4

adjective
  1. Unrealistic and impractical: [The author] shows what is testable physics, what is philosphy's domain, and what is blue-sky nonsense” (Ann Finkbeiner).
  2. Having a cloudless sky; clear: a blue-sky day.
intransitive verb blue-skied, blue-sky·ing, blue-skies
To hold or express unrealistic or impractical views, especially in estimating something. Often used with it.

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