Definition
"Flinthead" is a colloquial term, and without specific context, its meaning can be ambiguous. However, historically, it might refer to someone considered stubborn or unintelligent, perhaps relating to the perceived hardness or unyielding nature of flint. The term is not commonly used and can be considered offensive depending on the context and intention. It's generally better to avoid using this term. Using "flinthead" might be the opposite of giving someone a compliment, it might hurt them.