save up
US /seɪv ʌp/
UK /seɪv ʌp/

1.
economizar, poupar
to keep money so that you can use it later, especially to buy something that you want
:
•
I'm trying to save up for a new car.
Estou tentando economizar para um carro novo.
•
She's been saving up all year for her vacation.
Ela tem economizado o ano todo para suas férias.