be no 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.
See also: no, stranger
Farlex Dictionary of Idioms.

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.
See also: no, something, stranger
Farlex Partner Idioms Dictionary
See also:
  • be no/a stranger to something
  • no stranger to (something)
  • write the book on
  • wrote the book on
  • wrote the book on (something)
  • know what (one) is talking about
  • know what you're talking about
  • know a thing or two
  • have on the ball
  • have something on the ball