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knucklehead

noun

  1. idiot; stupid or inept person
L1154983 on Wikidata ↗

Wiktionary

Pronunciation: /ˈnʌkl̩ˌhɛd/

noun

Etymology: From knuckle + head.

  1. An idiot; a stupid or inept person.

    Don't stick that screwdriver into the live electrical outlet, you knucklehead!

knucklehead — meaning, definition (noun) · Vinony