What does the term 'rush bag' refer to?

The term 'rush bag' specifically refers to baggage that is delayed but must be sent on an alternative flight. This situation often arises when a passenger's luggage could not be transported on the same flight due to various reasons, such as time constraints during boarding or operational issues. In such cases, the airline prioritizes sending the delayed luggage on the next available flight to ensure the passenger receives it as quickly as possible. Therefore, categorizing it as a 'rush bag' reflects the urgency of delivering the luggage to the passenger without undue delay.

Understanding this concept highlights the importance airlines place on customer service and the measures they take to rectify situations when luggage does not accompany its owner. The other options refer to different types of baggage issues that do not align with the specific definition of a 'rush bag.'