de boca aberta

with one's mouth open

→ de
phrase Rare #42,979
with one's mouth open Often used to describe someone who is astonished or speechless.
PO: Fiquei de boca aberta quando vi o preço.
EN: I was amazed when I saw the price.

Por que está aí parado de boca aberta idiota?

Why are you standing there with your mouth open, idiot?

— Брат 2 (2000)

Tom disse ao filho para não comer de boca aberta.

Tom told his son not to eat with his mouth open.

E fica todo mundo de boca aberta!

And everyone is left speechless!

— Stalker (1979)