Refers to the middle child in a family who is considered less capable or outstanding compared to their elder and younger siblings, likening them to the narrow middle part of a waist drum.
小王家有三个孩子，大哥聪明能干，小妹活泼可爱，只有老二总是显得平平无奇，大家都开玩笑说他是“腰鼓兄弟”。
There are three children in the Wang family. The eldest brother is smart and capable, and the youngest sister is lively and charming. Only the second child always seems unremarkable, and everyone jokingly calls him "waist drum brother".
Era:
Ancient
Frequency:
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