play it cool

US /pleɪ ɪt kuːl/
UK /pleɪ ɪt kuːl/
"play it cool" picture
1.

fare il disinvolto, mantenere la calma

to act in a calm, unemotional way so that people think you are not anxious or excited

:
When she saw her ex-boyfriend, she tried to play it cool.
Quando vide il suo ex-fidanzato, cercò di fare la disinvolta.
Just play it cool and don't show them you're nervous.
Fai la disinvolta e non mostrare loro che sei nervoso.