dopey
baka
pratty
opaque
dunderheaded
dumbass
muddlebrained
simpleminded
dumbassed
numbskulled
derpy
daft
tomfool
stupidish
anserine
dumbbutt
dumb as an ox
thick
bull
retardical
numbnut
one brick short of a full load
lamebrained
airheaded
bodoh
blockheadish
stupidy
loony
stupidly
dym
harebrained
sill
goofball
dumb like a fox
putz
cockamamy
stuuupid
asinine
inane
fatuous
dumbish
stupidass
dumbfuckery
foppery
stupidicy
goofy ahh
thick as mince
pillocky
loopy
doltishly
thickhead
sohai
sawney
dumb as a rock
anserous
hash
jamoke
tomfoolish
dumb as a box of rocks
idiot
doinky
dumb as a doorknob
thick as two short planks
dumber than a box of rocks
dumb as nails
thick as a plank
ninnyish
hogswallop
fatuitous
simply
wank
mullock
chuckleheaded
horsetwaddle
lackwitted
shtus
crackbrained
nut-head
bubbleheaded
plank
boaby
blockhead
who shot John
dumb bunny
dumb cluck
load
doorknob
dullwit
dope
twonk
beetlebrain
bubblehead
malarkey
idiocity
idioticy
dingwad
blubberbrain
booby
ass