subs. phr. (American tramps).See quot.
1900. FLYNT, Tramping with Tramps, 398. TOMATO-CAN VAG: the outcast of Hoboland; a tramp of the lowest order, who drains the dregs of a beer-barrel into an empty TOMATO-CAN and drinks them; he generally lives on the refuse that he finds in scavenger barrels.