crackbrain
noun
crack·brain ˈkrak-ˌbrān 
: an erratic person : crackpot
crackbrained
ˈkrak-ˈbrānd
adjective 
Synonyms
- bug
- crazy
- fool
- fruitcake
- head case
- loon
- loony
- lunatic
- maniac
- nut
- nutcase
- nutter [British slang]
- psycho
- psychopath
- sickie
- sicko
- wacko
- whacko
See all Synonyms & Antonyms 
Example Sentences
considered a crackbrain in his own time, the artist is now recognized as a genius a crackbrain who wore bedroom slippers to the grocery shop
Word History
First Known Use
circa 1570, in the meaning defined above
crackbrains
noun
1
as in psychopaths
a person having or showing a severely disordered or abnormal state of mind considered a crackbrain in his own time, the artist is now recognized as a genius Synonyms & Similar Words
Relevance
- psychopaths
- lunatics
- fools
- maniacs
- head cases
- nuts
- bugs
- psychos
- crazies
- schizos
- wackos
- psychoneurotics
- sickos
- sickies
- schizophrenes
- loonies
- loons
- nutcases
- nutters
- whackos
- fruitcakes
- patients
- psychotics
- mythomaniacs
- cracks
- characters
- abnormals
- schizoids
- madmen
- deviants
- madwomen
- paranoids
- monomaniacs
- cases
- sociopaths
- flakes
- schizophrenics
- neurotics
- obsessives
- screwballs
- fantastics
- kooks
- originals
- eccentrics
- weirdos
- oddballs
- cranks
- crackpots
- obsessive-compulsives
- quizzes
- zanies
- manic-depressives
- codgers
- oddities
- tykes
- tikes
2
as in nuts
a person of odd or whimsical habits a crackbrain who wore bedroom slippers to the grocery shop Synonyms & Similar Words
- nuts
- eccentrics
- odd ducks
- head cases
- characters
- originals
- cranks
- flakes
- quixotes
- pieces of work
- mavericks
- screwballs
- kooks
- weirdos
- oddballs
- crackpots
- freaks
- bohemians
- cracks
- quizzes
- rarities
- zanies
- codgers
- nutcases
- oddities
- nutters
- fruitcakes
- fantasts
- fantasticoes
- nonconformists
- coots
- geezers
- curios
Antonyms & Near Antonyms
- sheep
- followers
- conformists
- conformers