nutcase
Someone completely unhinged
A nutcase is an insane or extremely eccentric person: Her uncle is a complete nutcase.
The term is informal and often affectionate—calling someone a nutcase suggests they're harmlessly crazy rather than dangerously so.
Eccentric with strange ideas
- kookEccentric or strange person
- weirdoPeculiar person, dismissively
- oddballEccentric individual
- fruitcakeCandied, nutty holiday loaf
whacko · dingbat · screwball · wackadoodle · loon · cuckoo · loony · madman
Severe reality detachment
- delusionStubbornly held false belief
- hallucinationPerception without external cause
- paranoiaIrrational persecution fears
- maniaIntense, consuming obsession
derangement · breakdown · schizophrenia · bipolar · disturbed · unhinged · deranged · unstable
Lacking regularity or consistency
- volatileLiable to sudden change
- impulsiveActing without deliberation
- mercurialProne to sudden change
- capriciousSubject to sudden changes
unstable · wild · reckless · unhinged · manic · chaotic · temperamental · fickle
Artistic nonconformist type
- quirkyIdiosyncratically unusual
- unconventionalDeparting from standard practice
- nonconformistRejects prevailing social standards
- maverickIndependent-minded rule-breaker
oddball · kooky · zany · idiosyncratic · outlandish · unorthodox · original · offbeat
crackpot
Eccentric with strange ideas
fruitcake · whacko · dingbat · screwball · wackadoodle · loon · cuckoo · loony · madman · lunatic
psychosis
Severe reality detachment
- delusionStubbornly held false belief
- hallucinationPerception without external cause
- paranoiaIrrational persecution fears
mania · derangement · breakdown · schizophrenia · bipolar · disturbed · unhinged · deranged · unstable · committed
erratic
Lacking regularity or consistency
capricious · unstable · wild · reckless · unhinged · manic · chaotic · temperamental · fickle · sporadic
bohemian
Artistic nonconformist type
- quirkyIdiosyncratically unusual
- unconventionalDeparting from standard practice
- nonconformistRejects prevailing social standards
maverick · oddball · kooky · zany · idiosyncratic · outlandish · unorthodox · original · offbeat · misfit
nutcaseconformist
One following accepted norms
conformer · follower · sheep · straight arrow · square
nutcasesage
Wisdom keeper or seasoning
genius · thinker · intellectual · voice of reason · level head