keep your shirt on
US /kiːp jʊər ʃɜːrt ɑːn/
UK /kiːp jʊər ʃɜːrt ɑːn/

1.
rustig aan doen, kalm blijven
to tell someone to calm down or not to get angry
:
•
Just keep your shirt on, we'll get there eventually.
Rustig aan, we komen er uiteindelijk wel.
•
Hey, keep your shirt on! There's no need to yell.
Hé, rustig aan! Je hoeft niet te schreeuwen.