bosom friend

American  

[booz-uhm frend] / ˈbʊz əm ˈfrɛnd /

noun

1. a close or intimate friend.

   After her family moved to another country, Ayana continued to stay in touch with the bosom friend she left behind.

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Etymology

Origin of bosom friend

First recorded in 1580–90

Example Sentences

When his bosom friend and mentor Roy Cohn contracted the virus, Trump “dropped him like a hot potato”, Cohn’s secretary has said.

From The Guardian

At a June meeting in St. Petersburg, where the two countries signed a flurry of trade deals, Xi called Putin his “best and bosom friend” and announced that Beijing would send two pandas to Moscow, always a sign of Chinese diplomatic warmth.

From Washington Post

In June, Chinese president Xi Jinping called Putin his “best and bosom friend,” adding he cherished their “deep friendship.”

From The Guardian

That meeting came shortly after Mr. Xi called Mr. Putin his “best and bosom friend.”

From Washington Times

While Trump was in Europe, Putin and Xi met: Xi called Putin his “best and bosom friend” and the pair went on boat rides.

From The Guardian