From Longman Dictionary of Contemporary Englishoffice/paper/delivery etc boyoffice/paper/delivery etc boyBOa young man who does a particular job → boy
Examples from the Corpus
office/paper/delivery etc boy• He opened a flower shop but spends most of his time working as a delivery boy.• Perhaps he had just been a delivery boy.• And he'd send messages back through his delivery boy!• Policeman, judge, delivery boy, priest, referee, commissionaire.• Even little office boys dressed as though they were running the country.• The restaurant delivery boy rode skillfully up on his bike.• One container held around thirty dollars in change and small bills, handy for tipping delivery boys, I suppose. 