live in each other's pockets
Said of people who spend a lot of time together. When I was in college, my best friend and I went everywhere together. We basically lived in each other's pockets for four years.
live in each other's pockets
mainly BRITISHIf two or more people live in each other's pockets, they spend a great deal of time together. Just because you're married doesn't mean you have to live in each other's pockets. Note: Other verbs are sometimes used instead of live. It's hard to explain how the two of them survived 23 years in each other's pockets. Note: This expression is used to show disapproval.
be/live in each other’s ˈpockets
(British English) if two people are in each other’s pockets, they are too close to each other or spend too much time with each other: They live together, work together and socialize together. If you ask me, it can’t be healthy to live in each other’s pockets like that.