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
crackbrain
noun
1
as in psychopath
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
- psychopath
- lunatic
- fool
- maniac
- head case
- bug
- psycho
- crazy
- wacko
- schizo
- loony
- sicko
- nutcase
- nut
- loon
- fruitcake
- nutter
- crack
- whacko
- abnormal
- psychotic
- schizophrene
- patient
- sickie
- character
- paranoid
- psychoneurotic
- fantastic
- deviant
- madman
- case
- madwoman
- neurotic
- schizoid
- schizophrenic
- obsessive
- original
- sociopath
- weirdo
- flake
- monomaniac
- eccentric
- kook
- mythomaniac
- crank
- oddball
- screwball
- crackpot
- zany
- codger
- quiz
- oddity
- tyke
- manic-depressive
- obsessive-compulsive
- tike
2
as in eccentric
a person of odd or whimsical habits a crackbrain who wore bedroom slippers to the grocery shop Synonyms & Similar Words
- eccentric
- odd duck
- character
- head case
- original
- piece of work
- crank
- flake
- weirdo
- nut
- kook
- oddball
- screwball
- crackpot
- freak
- crack
- zany
- nutcase
- bohemian
- codger
- fruitcake
- maverick
- nutter
- rarity
- quiz
- oddity
- quixote
- nonconformist
- geezer
- coot
- curio
- fantastico
- fantast
Antonyms & Near Antonyms
- sheep
- follower
- conformist
- conformer