Language: en
Meaning: (idiomatic)Afancifulnotion; anunrealisticorludicrousconcept.1593,Gabriel Harvey,Pierce's Supererogation, or, A New Praise of the Old Ass[2]:You may discourse of Hermes' ascending spirit, of Orpheus' enchanting harp, of Homer's divine fury, of Tyrtaeus' enraging trumpet, of Pericles' bouncing thunderclaps, of Plato's enthusiastical ravishment, and I wot not what marvellouseggs in moonshine: but a fly for all your flying speculations when one good-fellow with his odd jests, or one mad knave with his awk hibber-gibber, is able to put down twenty of your smuggest artificial men, that simper it so nicely and coyly in their curious points.1951,C. S. Lewis, chapter 7, inPrince Caspian, Collins, published1998:[…]your Majesty knows I think the Horn—and that bit of broken stone over there—and your great King Peter—and your Lion Aslan—are alleggs in moonshine.
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