What's happening? Idioms: Gravy Train martin 21 March, 2013 Example sentence: "Ian got a big bonus for his brief consulting job. He's really on the gravy train!" Embed this Illustration on Your Site: Learn how to speak English with Kaplan Click the link for the full Money Idioms illustration! author: martin (317 Posts) Share this with your friends author: martin (317 Posts) View the discussion thread.