The phrase "bulldog courage" refers to someone who exhibits a tenacious and fearless attitude, often in the face of adversity. Some synonyms for this term include determined, resolute, plucky, gutsy, and brave. All of these words describe an individual who is willing to stand up for what they believe in, often at great personal risk. Other synonyms for bulldog courage might include steadfast, unwavering, unyielding, and indefatigable. Whatever words you use, the idea is the same - someone who possesses bulldog courage is someone who is unwilling to back down in the face of challenge, even when the going gets tough.