creep up

US /kriːp ʌp/
UK /kriːp ʌp/
"creep up" picture
1.

esgueirar-se, subir gradualmente

to move slowly and quietly so as not to be noticed

:
The cat crept up on the bird.
O gato se esgueirou até o pássaro.
Prices have been creeping up steadily.
Os preços têm subido constantemente.