gravy train 美差（俚语）
英文释义
A job in which one's earns more money than one really deserves.
The boss's brother has a gravy train with that useless job he was given in our company, and spends most of his time playing golf.
老板的弟弟在我们公司有一份美差，他只是当个闲职，把大部分时间花在打高尔夫球上。