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to lose one's cool
01
to become suddenly very angry, often to the point of shouting or behaving in an aggressive manner
![to [lose] {one's} cool definition and meaning](https://cdn.langeek.co/photo/42680/original/?type=jpeg "to [lose] {one's} cool definition and meaning")
What is the origin of the idiom "lose one's cool" and when to use it?
The origin of the idiom "lose one's cool" can be traced to American English slang from the mid-20th century. The term "cool" in this context refers to maintaining a calm, composed, and unruffled demeanor. It can be employed in personal relationships during arguments or conflicts when individuals become overwhelmed by their emotions and react impulsively. In professional settings, it may be used to describe moments of high stress or pressure, such as during presentations, meetings, or negotiations, when someone becomes visibly flustered or unable to maintain a calm demeanor.
例
He lost his cool and shouted at his colleague in the meeting.
By the time the meeting was over, Roger had fully got a grip on himself after momentarily losing his cool when criticized.
He often loses his cool when things don't go according to plan.
They are losing their cool due to the long wait.
Even in chaotic moments, he stayed self-contained, never losing his cool.
