The term "messenger boy" is an outdated term that is no longer commonly used in today's society. However, there are many synonyms that could be used in place of that term. Some of these synonyms include courier, delivery person, mail carrier, postman, postwoman, dispatch rider, conveyer, and messenger. These terms refer to individuals who transport messages, packages, or other items from one location to another. In today's digital age, many of these tasks are carried out through electronic means such as email, social media, or messaging apps. Nevertheless, these synonyms still hold relevance in various industries where physical delivery of messages is required.