BLOW ONE'S COOL
blow one's cool: translation
lose one's cool & blow one's cool
to lose one's temper; to lose one's nerve. •
Wow, he really lost his cool! What a tantrum!
•
Whatever you do, don't blow your cool.
* * *
{v. phr.}, {slang}, {informal} To lose your composure or self-control. * /Whatever you say to the judge in court, make sure that you don't blow your cool./