rattlebrained
ratt·leb·rai·ned
adjective
1.
lacking sense or discretion
- “his rattlebrained crackpot ideas”
- “how rattlepated I am! I”
Origin
From rattle + brained.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.