1
general::
Phrase(s): the man in the street
Fig. the ordinary person. • Politicians rarely care what the man in the street thinks. • The man in the street has little interest in literature.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, woman in the street. An ordinary, average person, as in It will be interesting to see how the man in the street will answer that question. This expression came into use in the early 1800s when the votes of ordinary citizens began to influence public affairs. Today it is used especially in the news media, where reporters seek out the views of bystanders at noteworthy events, and by pollsters who try to predict the outcome of elections.
American Heritage Idioms