messenger boy
From Longman Dictionary of Contemporary Englishmessenger boyˈmessenger ˌboy noun [countable] someone who delivered messages to other people as a job in the pastExamples from the Corpusmessenger boy• Being a messenger boy just isn't where it's at.• A messenger boy had joined them, was trying to help.• What was so bloody active about being an overblown messenger boy?• Lord Tebbit calls him Mr Kohl's messenger boy to Copenhagen.• After questioning the messenger boy for some three hours, Berret and Harris released him.