1. Cattle or sheep that have not been branded or marked; unbranded livestock.
Usage: chiefly Australian and New Zealand; plural form; singular is cleanskin
2. A person with no criminal record or police history.
Usage: informal; chiefly Australian
3. Wine that is not labeled with a brand name; generic or unbranded wine.
Usage: chiefly Australian; informal

Examples

• The station owner rounded up the cleanskins from the back paddock.
• The police were looking for cleanskins who might be willing to work undercover.
• He bought a bottle of cleanskins from the supermarket because it was affordable.
• Cleanskins in the herd were easier to identify than the branded cattle.
• The detective noted that the suspect was a cleanskin with no prior arrests.