off the deep end
wackadoodle
batshit
off one's box
off one's tree
out of one's tree
out of one's box
out of one's gourd
wacko
have a screw loose
nutburger
loony tune
fucktarded
cuckoo for Cocoa Puffs
balmy
unbalanced
rocket
stunod
screwy
misreason
kooky
on acid
nutter
goony
irrationalistic
crackpot
dionysian
toys in the attic
hyphy
jimjam
dotty
tapped
to distraction
nutbar
cockamamie
crazyhead
bullshit
crazo
WTFery
fruitcake
poop
apartments to let
funky
git
irrationality
screw loose
crazyitis
have bats in one's belfry
half-wit
ratty
off-minded
insane
dingbat
pop one's cork
glaik
fleabrain
irrationally
tonto
5150
irrationalness
mad
mad as a hatter
nutso
crazy as a pet coon
cuckooness
buck wild
mad as a mongoose
idiotical
raving
derationalize
bozo
mad as a cut snake
irrationalize
flip one's wig
ziphead
inanely
stupe
fictive
fatuous
Laputan
fatuously
wild
lackwit
baboon
freakout
foibled
noddy
poke
lunatically
loony
fantastic
bum head
bumhole
unbelievingly
pseudoism
fucklet
off the deep end
wackadoodle
batshit
wacko
fucktarded
cuckoo for Cocoa Puffs
balmy
unbalanced
screwy
kooky
goony
irrationalistic
dionysian
hyphy
jimjam
dotty
tapped
nutbar
cockamamie
bullshit
funky
stunod
ratty
off-minded
insane
tonto
5150
mad
mad as a hatter
crazy as a pet coon
buck wild
mad as a mongoose
idiotical
mad as a cut snake
fictive
fatuous
Laputan
wild
lackwit
foibled
fantastic
irrationally
nutso
inanely
fatuously
lunatically
unbelievingly
batshit
nutburger
wackadoodle
loony tune
rocket
stunod
wacko
misreason
nutter
crackpot
toys in the attic
crazyhead
crazo
WTFery
fruitcake
poop
apartments to let
git
irrationality
screw loose
crazyitis
half-wit
dingbat
glaik
fleabrain
irrationalness
cuckooness
raving
bozo
ziphead
stupe
baboon
freakout
noddy
poke
loony
bum head
bumhole
pseudoism
fucklet
have a screw loose
have bats in one's belfry
pop one's cork
derationalize
irrationalize
flip one's wig
English words for 'Crazy, erratic, or irrational.'
As you may have noticed, above you will find words for "Crazy, erratic, or irrational.". Hover the mouse over the word you'd like to know more about to view its definition. Click 
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