street smart (also street-smart)

• 1. 

  ADJ Someone who is street smart knows how to deal with difficult or dangerous situations, especially in big cities. (在艰难、危险环境或大城市)有巧妙生存能力的 [美国英语] [非正式]

  例：

  He is street smart and is not afraid of this neighbourhood.

  他有城市人的精明劲儿，不怕这儿附近的人。