clunkhead

[ kluhngk-hed ]
/ ˈklʌŋkˌhɛd /

noun Slang.

a stupid or foolish person.

Origin of clunkhead

An Americanism dating back to 1950–55; clunk + head
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019