smart casual
US /ˌsmɑːrt ˈkæʒ.u.əl/
UK /ˌsmɑːrt ˈkæʒ.u.əl/

1.
商务休闲, 时尚休闲
a dress code that is neat, conventional, and relatively informal, typically for a workplace or social event
:
•
The invitation specified smart casual attire.
请柬上注明了商务休闲着装。
•
For the office party, the dress code is smart casual.
办公室派对的着装要求是商务休闲。