gravy train

(sl 俚 esp US) means of getting a lot of money without much effort (eg through corruption) 轻易捞到大量钱财的手段（如贪污、 舞弊）: be/get on the gravy train 大把捞钱.

gratis, gratitude, gratuitous, gratuitously, gratuitousness, gratuity, grave, gravel, gravelly, gravely, graven, graven image, gravestone, graveyard, graving dock, gravitate, gravitation, gravitational, gravity, gravy, gravy-boat, gray, grayscale, graze, grazier, grazing, grazing land, grease, grease-gun, grease-paint, grease-proof paper, greasily, greasiness, greasy, great, Great Britain, great circle, greatcoat, greater, Greater London,