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lunkhead

/ˈlʌnk.hɛd/ noun

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about lunkhead at Wordnik → Where our words come from →

  1. A fool or idiot.
    You are a lunkhead! How could you be so stupid?

Origin

Probably from *lunk (perhaps an alteration of lump; compare hunk & hump), a diminutive of lump + head.

From Wiktionary, via Kaikki.org (CC BY-SA)