The PIR is an abbreviation (Parent in Room) a term commonly employed by teenagers and youths when chatting or communicating online. It is an indication of the presence of a parent or a guardian, hence the dialogue must remain proper or wait a little. The term is commonly used to evade embarrassing circumstances or to avoid trouble. PIR is a fast alert that does not attract attention, the user can change their language, tone, or topic in real-time once they communicate with friends.