Slang Miserable or wretched: a crummy situation in the family. (adjective)
Slang Shabby or cheap: a crummy little rowboat. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "crummy" in a sentence
"It's those little things that give me joy about this game and they really do weigh up to the lack of sleep in crummy beds in rooms crowded by people with sore feet and backs and heads because they drank too much and/or had too little sleep and they nag at each other about little things like "you stole my belongings!","
"If you thought Sean Connery kicked ass in crummy low-res, just wait til you see him whip a chair in 1080p."
"Being a PD film, “Johnny the Giant Killer” has only been seen in crummy bootlegged dupes (most seem to come from well-worn 16mm prints)."