adj.
- Crazy; insane.
- Extremely enthusiastic: I'm nuts about opera.
Used to express contempt, disappointment, or refusal.
[From NUT.]
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.