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