Definition: "Buckethead" is a term in African American culture, generally used to describe someone who is very aggressive or violent. The word "buckethead" comes from the slang expression, which refers to an aggressive person with large fists that they use when shouting at others. The term often implies someone who is overly hostile or intimidating, but also might be a metaphor for someone who is excessively stubborn, unyielding, or prone to anger.