- a person lacking intelligence
- a person who idles time away
- obsolete a freak or monster
WordReference Random House Unabridged Dictionary of American English © 2026
moon•calf
(mo̅o̅n′kaf′, -käf′),USA pronunciation n., pl. -calves.
- a congenitally grossly deformed and mentally defective person.
- a foolish person.
- a person who spends time idly daydreaming.
- moon + calf1 1555–65
Collins Concise English Dictionary © HarperCollins Publishers::
mooncalf /ˈmuːnˌkɑːf/ n ( pl -calves /-ˌkɑːvz/)