dipstick
pelf
dropkick
mammet
pig dog
drool bucket
divvie
no-good
dicksplat
hammerhead
dipshidiot
div
nimrod
schmendrick
airhead
shit for brains
pack
dummkopf
lackbrain
jizzrag
dickwad
dillweed
numskull
doink
shite
bampot
barmpot
dumdum
spack
nonce
bugger
spacky
submoron
insect
addle-brain
scrote
addlehead
gaby
bimpert
idlehead
crackhead
dickbrain
dweebling
lackwit
monkey
arsewipe
oxygen thief
not the sharpest tool in the shed
diphead
not the sharpest knife in the drawer
muff
tardling
simp
fool
not the sharpest tool in the box
Benny
eejit
shitbag
crapsack
worm
knobhead
toerag
asshat
craphead
Boeotian
gobdaw
pinheadedness
moron
ballbag
four oh four
chump
turd
wally
weeniehead
doilem
conehead
duncehead
turkey
patty
dope
boob
jackass
dumbbell
doughnut
dimbus
knob-end
gonk
pinhead
dummy
booby
unadept