keep your head
US /kiːp jʊər hɛd/
UK /kiːp jʊər hɛd/

1.
garder son calme, rester serein
to remain calm in a difficult or stressful situation
:
•
It's important to keep your head during a crisis.
Il est important de garder son calme pendant une crise.
•
Even when everything went wrong, she managed to keep her head.
Même quand tout allait mal, elle a réussi à garder son calme.