Proper noun
Joe Public
(idiomatic) A hypothetical average or generic member of the public; the common man (or person, by extension).
Quoting Joe Public proved a dangerous game in the 2008 US presidential elections after he was personified in Joe 'the' Plumber, an actual plumber without previous media exposure.
You lose power in Britain and you are just Joe Public again. Ken Livingstone
Usage John Doe is sometimes used to refer to a typical male in other contexts as well, in a similar manner to John Q. Public in the United States or Joe Public, John Smith or Joe Bloggs in Britain. Source: Internet
Warner closed down the Joe Public team after he quit FIFA and King went on to work as National Under-20 head coach and assistant to National Senior Team coach Stephen Hart. Source: Internet