play it cool

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

bersikap tenang, berlagak santai

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.
Ketika dia melihat mantan pacarnya, dia mencoba untuk bersikap tenang.
Just play it cool and don't show them you're nervous.
Cukup bersikap tenang dan jangan tunjukkan bahwa kamu gugup.