Also found in: Thesaurus, Medical, Idioms.
adj. lous·i·er, lous·i·est
1. Inferior or worthless: a lousy play.
2. Extremely contemptible; nasty: a lousy trick.
3. Sick or unwell: I feel really lousy.
4. Infested with lice.
5. Slang Abundantly supplied: lousy with money.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.