no-go area
nounUK /ˌnəʊ ˈɡəʊ ˌeəriə/
US /ˌnoʊ ˈɡoʊ ˌeriə/
A no-go area is a place that is too dangerous for people to go into.
The soldiers warned us that the old factory was a no-go area.
OTHER MEANINGS
2. A place where a particular group of people are not allowed to enter.
The club was a no-go area for anyone under eighteen.
3. A topic that people avoid talking about because it causes trouble.
Money was a no-go area at their family dinners.
4. An area that is closed to the public for safety or security reasons.
After the storm, the beach was a no-go area until it was cleaned up.