My two cents...
William Burroughs used the term "citizen" to great effect to denote average, law-abiding folk outside of his characters' demi-monde of thieves, junkies and losers. I always read the word as being somewhat demeaning, as if the "citizens" were less hip than his main characters.
If I remember correctly, Jim Thompson may have used "citizen" in the same manner.
Also, as I write this, the term "gen pop" (for general population) comes to mind as well... don't know if that helps at all.