If a French man tells you to keep your 'sang-froid cold blood' what does he mean?

When a French man tells you to keep your "sang-froid," he is advising you to stay calm and composed in a difficult or stressful situation. The term "sang-froid" translates to "cold blood" in English, and it refers to maintaining a sense of cool-headedness and emotional control when faced with challenges or pressure. This expression emphasizes the importance of remaining level-headed and not letting your emotions get the best of you.