A stupid knucklehead, some who generally makes poor choices. A term used to convey a sense of disappointment of another's rash action
Person 1: Jimmy stole a bag of skittles from the convenience store!
Person 2: Ugh, he is such a stupknuckle!
Person 2: Ugh, he is such a stupknuckle!
by Stupknuckle May 29, 2016
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