- Extremely foolish; crazy: a crackbrained ideaMore example sentences
- It cannot be possible that a man of that sagacity should be associated with such a crackbrained scheme.
- A belief or a conviction, no matter how crackbrained, is not an assertion subject to editorial or legal correction.
- On his own, he would have shared in the crackbrained political theories that abounded wherever tourists were to be found.
More definitions of crackbrainedDefinition of crackbrained in:
- The US English dictionary