If someone who lives in the countryside refers to someone from a town or city as a townie, they disapprove of that person because they think they have no knowledge of the countryside or country life.
[disapproval]
townie in British English
(ˈtaʊnɪ) or townee (taʊˈniː)
noun mainly British informal mainly, often derogatory
1.
a permanent resident in a town, esp as distinct from country dwellers or students
2.
a young working-class person who dresses in casual sports clothes
townie in American English
(ˈtaʊni)
noun
Informal
a resident of a town, esp. one of college age, who is not a student at the local college
Examples of 'townie' in a sentence
townie
Well, if the townie wasn't going to freeze to death she would have to find some fuel from somewhere.
Erskine, Barbara MIDNIGHT IS A LONELY PLACE (2003)
And ten months in the country may have turned me slightly savage, but I'm still a sentimental townie at heart...' The trailer shook.