I'm looking for a word or phrase to describe two people who would have spent long periods of time together, to the point where they know each other's idiosyncrasies, would have many in-jokes, finish each other's sentences etc.
closed as off-topic by Mari-Lou A, jimm101, jejorda2, John Lawler, choster Oct 19 '17 at 20:58
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- "Questions on choosing an ideal word or phrase must include information on how it will be used in order to be answered. For help writing a good word or phrase request, see: About single word requests" – Mari-Lou A, jimm101, jejorda2, John Lawler, choster
Simpatico: "Being on the same wavelength," M-W
The word captures the idea of two or more people who are in tune with each other.
It is a bit old fashioned, but bosom buddies fits.
One's close or closest friend; a friend one holds dear to one's heart.
We grew up right next door to each other, so we have been bosom buddies since we were kids.
The Free Dictionary by FARLEX
A more modern (and informal) phrase would be brother from another mother.
These expressions don't refer to actual half-siblings. A brother from another mother is a friend that you feel as close to as if they were your actual brother.
That one person in your life who is like a sibling. You'll do anything for them, literally. They understand you, you understand them and you're always happy when you're around them. You just click.
Similar to best friend, but you can only really have one best mate, otherwise they are probably just good friends.
Old friends are those who have had the time together to have had all those moments and formed all those jokes.
You could describe people with this kind of relationship as being "thick as thieves."