city bike
城市自行车，公共自行车
口语·贬义，指行为放荡的女性
英文释义
a promiscuous or sexually liberated woman
例句
He called her a city bike after she dated three guys in one week.
典故来源
源自英国俚语，比喻像公共自行车一样被多人使用，带有贬义。