subintellectual
nonintellectual
submoron
birdbrain
fool
stun
subnormal
dimwit
lackbrain
subexpert
bumpkin
chawbacon
hayseed
rube
yahoo
yokel
hick
drool bucket
idiot
lowbrow
philistine
anti-intellectual
divvie
not the sharpest knife in the drawer
simpleton
not the sharpest tool in the box
dumb genius
simple
not the sharpest tool in the shed
gormless
dull
pinhead
boob
dummy
booby
dumbbell
dope
stupid
slow on the uptake
four oh four
disreputable
halfwit
submoronic
retard
dunce
knucklehead
shithead
loggerhead
numskull
light-witted
know-nothing
dunderhead
dumbass
bonehead
muttonhead
fuckhead
blockhead
lunkhead
half-witted
hammerhead
gobe-mouche
unknowledgeable
dirtbrain
gobemouche
throwback
nonvisionary
dipshidiot
slow
monkey
cacophrenic
dropkick
ungenius
nonsociologist
brainlet
bushwhacker
stupidass
hillbilly
incompetent
innocent
half-wit
inexperienced person
Boeotian
cerebrally challenged
intellectually challenged
dipstick
nonidealist
clever clogs
clever Dick
amateur
harebrain
nondescript
nonthinker
unidealist
boffin
blonde
dumdum
jabroni