knucklehead.
An idiot; a stupid or inept person.
Meaning & usage
An idiot; a stupid or inept person.
Don't stick that screwdriver into the live electrical outlet, you knucklehead!
Where this word comes from
Etymology tree English knuckle substratebor.? Proto-Indo-European *kap-? Proto-Indo-European *kap- Proto-Indo-European *káput Proto-Germanic *haubudą Old English hēafod Middle English heed English head English knucklehead From knuckle + head.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.