buck up
US /bʌk ʌp/
UK /bʌk ʌp/

1.
animarse, animar
to cheer up or to make someone feel more cheerful
:
•
Come on, buck up! Things aren't that bad.
¡Vamos, anímate! Las cosas no están tan mal.
•
She tried to buck up her friend after the bad news.
Ella trató de animar a su amiga después de la mala noticia.