finders keepers
idiomPart ofkeeper
finders keepers — idiom
1. A rule that says if you find something, you can keep it.
1.idiom
Definition
A rule that says if you find something, you can keep it.
Example
Maya found a dollar on the street and shouted, 'Finders keepers!'
When Diego picked up the lost wallet, his friend said, 'Finders keepers, right?'