noun
hand-me-down; used article (esp. clothes)
Polite prefix お + 古 (old). Refers to used items passed down, typically clothing, but can extend to other goods. Common in family contexts.
姉のお古の服をもらった。
I got my older sister's hand-me-down clothes.
このおもちゃは従兄弟のお古です。
This toy is a hand-me-down from my cousin.