包袱底兒

Simplified: 包袱底儿

bāofudǐr ㄅㄠ ˙ㄈㄨ ㄉㄧˇㄦ

    • family possessions kept untouched for years most valuable possessions

      dialect

    • secret private matter

      dialect

    • one's best skill trump card

      dialect

Sources