catch someone with their pants down

US /kætʃ ˈsʌm.wʌn wɪð ðer pænts daʊn/
UK /kætʃ ˈsʌm.wʌn wɪð ðer pænts daʊn/
"catch someone with their pants down" picture
1.

pillar con los pantalones bajados, pillar desprevenido

to discover someone doing something wrong or embarrassing, or to find them unprepared for something

:
The boss caught him with his pants down when he was playing games on his computer during work hours.
El jefe lo pilló con los pantalones bajados cuando estaba jugando en su ordenador durante las horas de trabajo.
The sudden inspection caught many employees with their pants down, as they hadn't prepared their reports.
La inspección repentina pilló a muchos empleados con los pantalones bajados, ya que no habían preparado sus informes.