adj., -i·er, -i·est.
- Infested with lice.
- Extremely contemptible; nasty: a lousy trick.
- Very painful or unpleasant: a lousy headache.
- Inferior or worthless: a lousy play.
- Slang. Abundantly supplied: lousy with money.
lousiness lous'i·ness n.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.