Pronunciation: /ˈnʌkəlˌhɛd/
noun a stupid or foolish person
A1 My little brother can be such a knucklehead sometimes.
A2 The class clown was always getting in trouble for acting like a knucklehead.
B1 I can't believe that knucklehead forgot his homework again.
B2 The coach called the player a knucklehead for making the same mistake twice.
C1 The CEO was frustrated with the knucklehead who cost the company millions in a failed project.
C2 Despite his intelligence, his stubbornness often made him come across as a knucklehead in meetings.
formal The professor referred to the student as a knucklehead for not following the assignment guidelines.
informal My little brother can be such a knucklehead sometimes, always getting into trouble.
slang Hey knucklehead, stop messing around and focus on the task at hand.
figurative She called him a knucklehead for constantly making the same mistakes, implying he lacked intelligence.
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