Wiktionary
vb. (alternative form of lose one's cool English)
Usage examples of "lose his cool".
She wished fervently that he would yell at her or shake her, or do something to lose his cool, composed manner.
Bobby Shaftoe is not one to lose his cool in the heat of action, but the rest of the evening is a blurry fever dream to him.
Terence wondered if something was going on besides Clare to make him lose his cool this way.
Strathmore lose his cool only a handful of times, and never once with her.
Strathmore lose his cool only a handful of times, andnever once with her.
I even hoped Ray would lose his cool enough to bloody that perfect hook nose.
Nick has never witnessed a senior officer so completely lose his cool.
No one had warned him this might happen, but the Mute did not lose his cool.
Whether he turned in his wings or not, the kid would face a mountain of scorn if he broke the unwritten aviator's law that a good flyer never, ever let the pressure make him lose his cool.
Bayer frowned slightly, but still didn't lose his cool, didn't let on what he felt.
He'd been christened Absalom Elvis da Vinci Williams, and he could lose his cool like a bolt of lightning.
She was the only person in the world who could make him lose his cool and raise his temperature at the same time just by smiling.