catch someone napping
US /kætʃ ˈsʌm.wʌn ˈnæp.ɪŋ/
UK /kætʃ ˈsʌm.wʌn ˈnæp.ɪŋ/

1.
przyłapać kogoś na drzemce, zaskoczyć kogoś
to surprise someone when they are not prepared for something, especially when they are not paying attention or are doing something they shouldn't be doing
:
•
The teacher caught him napping when he was playing games on his phone during class.
Nauczyciel przyłapał go na drzemce, gdy grał w gry na telefonie podczas lekcji.
•
The sudden inspection caught many employees napping, as they were not following company protocols.
Nagła inspekcja przyłapała wielu pracowników na drzemce, ponieważ nie przestrzegali protokołów firmy.