Definition of visiting fireman in US English:

visiting fireman

noun

North American
informal
  • 1An important visitor to a city or organization who is given an official welcome and especially cordial treatment.

    • ‘Group led by officers of the New York Society, members of the Mayo County Council and visiting firemen.’
    • ‘Two other stimulating components of Barghoorn's lunch group were the graduate students, such as Margaret Bryan Davis and Don Whitehead, and the many visiting firemen, such as Bill Critchfield and Sherwin Carlquist.’
    1. 1.1 A visitor or tourist who is accorded special attention because they are expected to spend extravagantly.

Pronunciation

visiting fireman

/ˈvizidiNG ˈfī(ə)rmən/