Blowing one's cool is a common expression used to describe losing one's temper or becoming angry. Fortunately, there are plenty of synonyms to convey the same sentiment. One phrase that can be used instead of blowing one's cool is to "fly off the handle." This phrase is commonly used when someone expresses anger suddenly and dramatically. Another synonym for blowing one's cool is "losing it," which is a more neutral term to describe becoming aggressive or emotional. The phrase "getting hot under the collar" is another option for showing frustration. Lastly, "flipping out" is perhaps the most informal synonym to describe losing one's temper.
