bosom buddy
Americannoun
plural
bosom buddies-
a close or intimate friend; bosom friend.
I didn't lack for friends, but had no particular bosom buddy.
Since third grade she and I have been kindred spirits and bosom buddies.
-
a nefarious associate or co-conspirator.
After the Soviet takeover in 1920, the building was occupied by one of Stalin's bosom buddies.
Etymology
Origin of bosom buddy
First recorded in 1920–25
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.