obstinately opinionated, especially in refusing to consider alternatives; stubborn.

What does a bullheaded mean?

: stupidly stubborn : headstrong.

Where did the term bull headed come from?

The word dates from the early 19th century, from the idea that a bull charges forward with strength and determination, but without any thought or contemplation. Definitions of bullheaded. adjective. obstinate and stupid. synonyms: bullet-headed, pigheaded obstinate, stubborn, unregenerate.