be no stranger to (something)

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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

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