concrete jungle

[ kon-kreet juhng-guhl, kong- ]

noun

1. any large, crowded city or urban area with little greenery or access to nature, sometimes one regarded as a dangerous place where people are engaged in a struggle for survival:

   Central Park is a breath of fresh air and nature in the middle of the concrete jungle that is New York City.

   The campaign ad plays to middle-class fears that an increasing crime rate is the first sign of a descent into violent anarchy and the concrete jungle.