The phrase "blow one's cool" is commonly used to describe someone getting angry or losing their temper. Antonyms for this phrase could include remaining calm, composed, collected, or tranquil. Someone who exhibits these traits in the face of a frustrating situation could be described as level-headed, poised, unflappable, or serene. It is important to remember that being able to control one's emotions is a valuable skill that can lead to better communication, increased productivity, and stronger relationships. By actively seeking out and practicing strategies for staying calm under pressure, individuals can improve their emotional intelligence and become more effective problem solvers.