from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An unbranded animal.
- n. Someone with no prior criminal record, a person with no previous convictions; loosely, someone who has not done anything wrong before, an unblemished character.
- n. An unlabelled bottle of wine.
- n. An undercover police officer who has not done a particular task before.
- n. A cricket bat with no maker's logo
From clean + skin. (Wiktionary)