Sang froid is a French term that is used to describe a person who remains cool and composed in difficult situations. It's a quality that is highly valued in many professions, especially in high-stress environments such as emergency services, the military, and healthcare. However, there are also many antonyms for this phrase that describe the opposite of sang froid. Some of these include panic, distress, agitation, and anxiety. These words describe a person who becomes overwhelmed by stress and loses their composure. While everyone experiences stress and pressure, developing the ability to remain calm and maintain a clear head is an important skill to cultivate in life.