be no/a stranger to something
be no stranger to (something)
To be thoroughly experienced in or knowledgeable about something or someone. Don't worry, I'm no stranger to spicy food. They brought in a crack agent who was no stranger to such complex cases.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
be no/a ˈstranger to something(formal) be familiar/not familiar with something because you have/have not experienced it many times before: He is no stranger to controversy.
Farlex Partner Idioms Dictionary © Farlex 2017