no-go area

美 
英 
  • n.禁区(常因被暴力团伙控制)
  • 网络禁止进入区;禁航区域;封锁范围
复数:no-go areas  
no-go area
n.
1.
禁区(常因被暴力团伙控制)an area, especially in a city, which is dangerous for people to enter, or that the police or army do not enter, often because it is controlled by a violent group
Some clubs are no-go areas for people over 30.
对于 30 岁以上的人来说,有些俱乐部是禁区。
This subject is definitely a no-go area(= we must not discuss it) .
这个话题绝对禁止谈论。