From Longman Dictionary of Contemporary Englishchuck wagonˈchuck ˌwagon noun [countable] American English old-fashioned TTBa vehicle that carries food for a group of people
Examples from the Corpus
chuck wagon• Jeep tours, hayrides, chuck wagon cookouts and trail rides are available for a fee.Origin chuck wagon (1800-1900) chuck “food” ((19-20 centuries)), perhaps from → CHUCK2 