noun, plural moon·calves.
Examples from the Web for moon-calf
If he is as you say, dye think he'll ever marry a moon-calf like Madge?The Heart of Mid-Lothian, Volume 2, Illustrated|Sir Walter Scott
It is not a moon-calf business, whatever that may be, and I will not give it up.Smith and the Pharaohs, and Other Tales|Henry Rider Haggard
It should be plain to every one, even though he need not behave like a moon-calf, that "one" is alone in his thoughts.Etiquette|Emily Post
As he passed the priest, his moon-calf countenance gave no hint of what he had been doing or thinking of.The Innocence of Father Brown|G. K. Chesterton