Noun
(Australia) An unbranded animal.
Synonym: clearskin
A person who does not have any tattoos.
Someone with no prior criminal record, a person with no previous convictions; loosely, someone who has not done anything wrong before, an unblemished character.
(Australia, New Zealand) An unlabelled bottle of wine.
An undercover police officer who has not done a particular task before.
(cricket) A cricket bat with no maker's logo
Source: en.wiktionary.org