creep up on
US /kriːp ʌp ɑːn/
UK /kriːp ʌp ɑːn/

1.
aproximar-se sorrateiramente, pegar de surpresa
to approach someone or something slowly and quietly so as not to be noticed
:
•
The cat tried to creep up on the bird.
O gato tentou se aproximar sorrateiramente do pássaro.
•
Don't let problems creep up on you; address them early.
Não deixe os problemas se acumularem; resolva-os cedo.