The story
First known use, by meaning
- from 17th c. Newborn (of an animal), not yet licked into shape; (by extension, of a person) naïve, inexperienced, unrefined.
- from 17th c. Crude, unpolished; not skilfully formed or finished.
- from 19th c. Not licked (by the tongue).
- from 20th c. Unbeaten, undefeated.
Etymology from Wiktionary, CC BY-SA 4.0.