Sleeping while on duty

Sleeping while on duty means that someone who is supposed to be working, like a police officer or a security guard, falls asleep or takes a nap when they are supposed to be doing their job. Just like when you are in school and your teacher is watching over you, these people are responsible for keeping others safe and need to be awake and alert. When they fall asleep, they cannot do their job properly and may miss important things that happen around them. It is very important for people who are working in these kinds of jobs to stay awake and alert so that they can do their job and keep others safe.