One born, raised and schooled in a middle/upper-middle class suburb who moves to the city in their mid to late 20's and acts like they've lived there their entire lives.
Surburban Runaways will only congregate in certain neighborhoods of the city (ones typically deemed "dangerous" by their suburban parents), with a specific safety-zone of stores and bars.
If/When they do return to their hometown, they always make a fuss and never refer to it's namesake:
"Ugh, I have to drive out to the suburbs this weekend for a birthday party. Don't know what time I'll make it back, traffic coming back from the suburbs is always a gamble."
"Craig and Ruben got an apartment in Humboldt Park!?"
"Yep, they moved out of Tinley a few years ago; they had a spot in Pilsen, they just moved again."
"Wow, never figured them for suburban runaways...I guess it is the hip thing these days."