Dictionary.com
Thesaurus.com
Synonyms

crackbrained

American  
[krak-breynd] / ˈkrækˌbreɪnd /

adjective

  1. foolish, senseless, or insane.


crackbrained British  
/ ˈkrækˌbreɪnd /

adjective

  1. insane, idiotic, or crazy

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of crackbrained

First recorded in 1625–35; crackbrain + -ed 3

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Most of the State had always assumed that the canal was a crackbrained project which a few boosters promoted for profit or publicity.

From Time Magazine Archive

Ideas Sirs: Considering the number of crackbrained ideas sponsored by Franklin Roosevelt does he not deserve the name Franklin "Stoopnagle" Roosevelt?

From Time Magazine Archive

Despite the crackbrained ideas, a former official of the National Security Council maintains that LaRouche has "one of the best private intelligence services in the world."

From Time Magazine Archive

To show business, the barter idea sounded as crackbrained as opening a theatre at the bottom of a well.

From Time Magazine Archive

That's one of 120 sail that we saw; multiply 120 by 20, and then you have the number of vessels that we must attend under this crackbrained scheme of ours.

From A Dream of the North Sea by Runciman, James