keep your hair on
US /kiːp jʊər hɛər ɒn/
UK /kiːp jʊər hɛər ɒn/
1.
used to tell someone to calm down and not get angry or upset
:
•
Just keep your hair on, there's no need to get so worked up.
•
Hey, keep your hair on! It was just a joke.
used to tell someone to calm down and not get angry or upset