If you say that someone has a bolt-hole to go to, you mean that there is somewhere that they can go when they want to get away from people that they know.
[British]
The hotel is an ideal bolt-hole for Londoners.
bolt hole in British English
or bolthole (ˈbəʊltˌhəʊl)
noun
a place of escape from danger
bolt-hole in American English
(ˈboʊltˌhoʊl)
noun British
1.
a path of escape
2.
a place for hiding, seclusion, etc.
: also ˈboltˌhole
Examples of 'bolt hole' in a sentence
bolt hole
It was the home of Horatio Welham---the reason Lucifer had chosen Colyton as his temporary bolt-hole.