from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Slang Miserable or wretched: a crummy situation in the family.
- adj. Slang Shabby or cheap: a crummy little rowboat.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. bad; poor
- adj. Full of crumb or crumbs; crumby.
- adj. Soft, like the crumb of bread; not crusty.
- n. Small van, bus, or railway car used to transport loggers or other resource workers to and from the worksite. A common term when referring to a vehicle with a compartment separate from the cab, housing the silvicultural, logging or mining crew during transport.
from the GNU version of the Collaborative International Dictionary of English
- adj. Full of crumb or crumbs.
- adj. Soft, as the crumb of bread is; not crusty.
- adj. of very poor quality.
from The Century Dictionary and Cyclopedia
- Full of crumbs.
- Soft, as the crumb of bread is; not crusty: as, a crummy loaf.
- Plump; buxom: as, a crummy lass.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. of very poor quality; flimsy
Probably from crumb.(American Heritage® Dictionary of the English Language, Fourth Edition)