have a screw loose
have bats in one's belfry
wackadoodle
batshit
nutburger
flip one's wig
cuckoo for Cocoa Puffs
nutter
crazo
off the deep end
jimjam
loony
lose one's mind
loon
balmy
derange
wacko
screw loose
doolally
cooked
dingbat
rocket
space case
stunod
fruitloop
asshead
mad hatter
arsehead
poke
go potty
insane
irrationalize
nutbar
cockamamie
mad
pop one's cork
nitwit
derationalize
tapped
knucklehead
dotty
go batshit
knob-end
maddening
craze
nutzoid
poop
idiotlike
kooky
drive someone crazy
maniacal
glaik
doilem
to distraction
go mad
insaniac
fictive
crazen
go moggy
half-wit
psycho
lame
dipshit
bum head
becraze
bozo
crack up
nut-bar
neddy
idiosomic
crackpot
crazyhead
whacko
nutty as a fruitcake
loco
apartments to let
non compos mentis
imbecilic
shitfucker
nutso
shitfuck
idiotize
baboon
fucktwat
cunthead
cuntfuck
lunkheaded
cuntfucker
fleabrain
loony tune
off one's box
wanker
mutt

English words for 'To be insane, irrational, or eccentric.'

As you may have noticed, above you will find words for "To be insane, irrational, or eccentric.". Hover the mouse over the word you'd like to know more about to view its definition. Click search related words by phrase or description. to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.

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