A suburb of any large urban city, in which the residents claim they are actually from the urban city they surround when actually they are being faggots and live 45 min to an hour away from the city limits. Kids in college who live in these 'boomburbs' usually associate themselves with the urban city in attempts to sound 'cool,' when in reality, they are being faggots. (Popular for kids from Naperville and other Chicago Suburbs to do at the University of Iowa)
Mike: "I am from Chicago."
Steve: "Really? What part?"
Mike: "Naperville, it's a boomburb of Chicago actually."
Stever: So you are not from Chicago?"
Mike: No. A boomburb."