Cách sử dụng
The expression "catch somebody napping" means to catch someone off guard or unprepared. It is used when someone is caught unaware while they are supposed to be paying attention or doing something important. For example, if a student is caught napping during a class, the teacher may say "I caught you napping!". It can also be used in situations where someone fails to take action on something important because they were not paying attention or were not prepared.