mooncalf

noun

1. (archaic)An abnormal mass within the uterus; a false conception.

   “Thou art very Trinculo indeed! How camest thou to be the siege of this moon-calf? Can he vent Trinculos?”

2. A poorly conceived idea or plan.
3. A dreamer, someone absent-minded or distracted; a fool, simpleton.

   ““[…] you’re a jobbernowl and a doodle, a maundering mooncalf and a blockheaded numps, a gaby and a loon; you’re a Hatter!” I shrieked the last epithet.”

   “But I can think of no one but a mooncalf or a gaby Who would trust their own child to raise a baby.”

   “He slipped it softly onto her unresisting finger and, like the unwise moncalf he was, kissed it.”