指某群体中出类拔萃的女性。仿“大哥大”而成outstanding woman in a certain group; big sister

• 她在学校曾赢得田径奖项，参加乐队演奏，还是拉拉队的大姐大。

  At school, she won athletic awards, was in the school band, and was the leader of the cheerleading squad.

• 大哥大、大姐大辅弼左右。

  Big sister and big brother are her loyal assistants.