DCHP-1 Online
rubber bum Slang 
See quote.
- 1961 Tom Briggs is one of the older hoboes who have switched from the railways to become "rubber bums"--hitch-hikers on long-distance trucks.
- 1961 Tom Briggs is one of the older hoboes who have switched from the railways to become "rubber bums"--hitch-hikers on long-distance trucks.