dead wagon
n.— «Allis, who said he had been without a business for the past seven months, told how he had received an offer of $100 a week from Fay to ride a “dead wagon” distributing cheap milk to grocers served by recalcitrant dealers.» —“Threats on His Life Disclosed by Groat” New York Times Oct. 25, 1929. (source: Double-Tongued Dictionary)