mooncalf

noun, plural moon·calves.

1. a congenitally grossly deformed and mentally defective person.
2. a foolish person.
3. a person who spends time idly daydreaming.

noun plural -calves (-ˌkɑːvz)

1. a born fool; dolt
2. a person who idles time away
3. obsolete a freak or monster