mean business

US /miːn ˈbɪz.nɪs/
UK /miːn ˈbɪz.nɪs/
"mean business" picture
1.

falar sério, estar determinado

to be serious and determined about what one is doing or saying

:
When the boss walked in with that look on his face, we knew he meant business.
Quando o chefe entrou com aquela expressão, sabíamos que ele falava sério.
The new security measures show that the company means business about protecting its data.
As novas medidas de segurança mostram que a empresa fala sério sobre a proteção de seus dados.