lighten up

US /ˈlaɪ.tən ʌp/
UK /ˈlaɪ.tən ʌp/
"lighten up" picture
1.

放松, 轻松点

to become less serious or more cheerful

:
Oh, lighten up! It was just a joke.
哦,放松点!那只是个玩笑。
You need to lighten up and enjoy life more.
你需要放松点,多享受生活。