plain clothes
US /ˌpleɪn ˈkloʊðz/
UK /ˌpleɪn ˈkloʊðz/

1.
ropa de civil, de paisano
ordinary clothes, not a uniform or special costume
:
•
The detective was working in plain clothes.
El detective estaba trabajando de paisano.
•
Security personnel often blend in plain clothes at events.
El personal de seguridad a menudo se mezcla de paisano en los eventos.