A job or work that pays more than it is worth: "For many years his job was a real gravy train but now the company has become very strict and will not pay overtime."
disapproval If an organization or person earns a lot of money without doing much work, you can say that they are on the gravy train. We were disgusted when bosses awarded themselves a massive pay rise. How can they get on the gravy train, but ask us to take a wage freeze?. An occupation or other source of income that requires little effort while yielding considerable profit. an organization, activity, or business from which many people can make money or profit without much effort