keep your shirt on

US /kiːp jʊər ʃɜːrt ɑːn/
UK /kiːp jʊər ʃɜːrt ɑːn/
"keep your shirt on" picture
1.

别激动, 冷静点

to tell someone to calm down or not to get angry

:
Just keep your shirt on, we'll get there eventually.
别激动,我们最终会到达那里的。
Hey, keep your shirt on! There's no need to yell.
嘿,别激动!没必要大喊大叫。