DCHP-1 Online
crummy [prob. < crumb body louse] Esp. West Coast, Slang 
n. See 1942 and 1964 quotes.
- 1942 (1946) Crummy . . . A box car or an old caboose converted to passenger carrying by the addition of a few wooden benches, and used to carry the men to and from work.
- 1957 Most of these men live in towns and travel perhaps forty miles to work in a "crummy."
- 1964 Loggers ride in cold and heat in old trucks called crummies, which are "crummy."
- 1942 (1946) Crummy . . . A box car or an old caboose converted to passenger carrying by the addition of a few wooden benches, and used to carry the men to and from work.