an imaginary flying island in Swift's Gulliver's Travels, the inhabitants of which engaged in a variety of ridiculous projects and pseudoscientific experiments.
La·pu·tan (lə-pyōōt'n) adj. Absurdly impractical or visionary, especially to the neglect of more useful activity.
[After the flying island of Laputa in Gulliver's Travels by Jonathan Swift, where absurd projects are pursued and useful pursuits neglected.] La·pu'tan n.