finder
noun [ C ] uk/ˈfaɪn.dər/ us/ˈfaɪn.dɚ/
发现者
someone who finds something
Idiom
finders keepers (losers weepers)idiom saying （儿语）东西谁捡到了就是谁的。
said by a child who has found an object to the child who has lost it, to show that they intend to keep it