LAPUTAN
airy, impractical, visionary, Laputan, windy
(adjective) not practical or realizable; speculative; “airy theories about socioeconomic improvement”; “visionary schemes for getting rich”
Laputan
(adjective) relating to or characteristic of the imaginary country of Laputa or its people
Source: WordNet® 3.1
La*pu"tan, a.
Definition: Of or pertaining to Laputa, an imaginary flying island
described in Gulliver's Travels as the home of chimerical
philosophers. Hence, fanciful; preposterous; absurd in science or
philosophy. "Laputan ideas." G. Eliot.
Source: Webster’s Unabridged Dictionary 1913 Edition