Blowing one cool is an idiomatic expression that refers to the act of losing one's temper or becoming angry. There are several synonyms to describe this state of being including getting heated, becoming irate, flying off the handle, losing it, flipping out, boiling over, going ballistic, getting agitated, becoming enraged, and going off on someone. These synonyms are commonly used to describe situations where someone becomes upset, frustrated, or angry, and they are often used interchangeably. It's important to control one's emotions and find healthy ways to manage anger, so that it is not blown out of proportion, and does not negatively impact relationships and other areas of life.