knucklehead[noun]Synonyms: dunce, blockhead, bonehead, clodpate, hammerhead, muttonhead, numskull, thickhead, thickskull, woodenhead
[TahlilGaran] English Synonym Dictionary ▲
knuck‧le‧head /ˈnʌk
əlhed/
noun [countable] American English spoken someone stupid – used when you are not very angry with them
Synonym : blockhead British English [TahlilGaran] Dictionary of Contemporary English ▲