Definitions for crackbrainˈkrækˌbreɪn
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Random House Webster's College Dictionary
crack•brainˈkrækˌbreɪn(n.)
a foolish or senseless person.
Origin of crackbrain:
1560–70
crack′brained`(adj.)
Citation
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"crackbrain." Definitions.net. STANDS4 LLC, 2013. Web. 22 May 2013. <http://www.definitions.net/definition/crackbrain>.

