Knucklehead in a Sentence 

Definition of Knucklehead  

a person who is stupid and hard-headed

Examples of Knucklehead in a sentence

The knucklehead constantly makes stupid decisions, like stealing cars and robbing banks.  
Even drove recklessly through the streets, acting like a knucklehead even though he knew better.  
The knucklehead and his foolish little bother ran around the city doing stupid things together.  

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