camp follower
跟着军队居住并跟着他们的人，通常是为了从他们那里获得食物和其他提供的服务
正式·表示依附者或投机者
英文释义
someone who associates with a group for personal gain or benefits, often without making a significant contribution
例句
He's just a camp follower who shows up at parties for free food and drinks without contributing anything.
典故来源
源自军事历史，指随军行动的非战斗人员（如商贩、家属），后引申为依附团体谋取利益而不做贡献的人。