1. (a person who is not very bright
"The economy, stupid!") 
stupid, stupid person, stupe, dullard, dolt, pudding head, pudden-head, poor fish, pillock 
synonim: głupek
synonim: ćwok
synonim: idiota
synonim: dureń
synonim: kretyn
synonim: baran
synonim: przygłup
synonim: bałwan
synonim: bezmózgowiec
synonim: półgłówek
synonim: pustak
synonim: półgłupek
synonim: pustogłów
synonim: kurzy móżdżek
synonim: ptasi móżdżek
synonim: głąb kapuściany
synonim: bezmózg
synonim: barania łąka
2. (a silly empty-headed person
"you would be a dingbat even to try it"
 "yet here he was with an upper class dingbat who just happened to be married to his sister") 
dingbat: : synonim: głupek
synonim: ćwok
synonim: idiota
synonim: dureń
synonim: kretyn
synonim: baran
synonim: przygłup
synonim: bałwan
synonim: bezmózgowiec
synonim: półgłówek
synonim: pustak
synonim: półgłupek
synonim: pustogłów
synonim: kurzy móżdżek
synonim: ptasi móżdżek
synonim: głąb kapuściany
synonim: bezmózg
synonim: barania łąka
1. (lacking or marked by lack of intellectual acuity) 
stupid 
synonim: niemądry
2. (not using intelligence) 
brainless, headless: : synonim: bezrozumny
3. (devoid of good sense or judgment
"foolish remarks"
"a foolish decision") 
foolish: : synonim: bezrozumny
synonim: nierozumny
(osoba) stupid, foolish
(mało znaczący) silly
(niezręczny, kłopotliwy) awkward
~ie pytanie stupid question
~ dowcip silly joke
~ kawał (oszukaństwo) hoax
robota ~iego fool's errand
adj foolish; stupid; silly
adj silly, stupid, foolish
pot.
głupi jak but -  stupid as a donkey
dumb adj
FOOLISH
STUPID
SILLY
IDIOTIC
ASININE
WEAK-MINDED
HAPLESS
ANILE
TRIFLING
INSIGNIFICANT
TRIVIAL
ANSERINE
INERT
TOMPISH
MUTTON-HEADED
OAFISH
DUMB
SLOW-WITTED
WITLESS
WOOD-HEADED
ADDLE-BRAINED
ADDLE-HEADED
ADDLE-PATED
FATUOUS
FOOL
IDIOT
NUMSKULL
GOOF
FATHEAD
adj pot. silly, stupid, foolish
adj. foolish
stupid
absurd
ass
crass
daft
gormless
inept
insane
insipid
muddle-headed
mute
nuts
obtuse
pigheaded
sodden
wacky
yokel
yoyo