包袱底儿[ bāo fu dǐ ér ]

⒈ 指多年未用的或最珍贵的东西。英the most precious,usu.untouched possession of the family;

⒉ 指个人隐私。例别揭人家包袱底儿。英a person's secrets;

⒊ 最擅长的绝技。例亮包袱底儿。英one's best act in performance;