be joined at the hip

be joined at the hip

slang To spend a lot of time with someone else, often a close friend. Every time I see Jenna, Kelli is right there with her. Those two are really joined at the hip these days.
See also: hip, join
References in periodicals archive ?
"Otherwise we could be joined at the hip," he said.
"I must remember to have a wee word with John before the match and advise him to remove all metal objects from his pockets - or we could be joined at the hip.
Less has been written about the special relationship that exists between the leader and his or her closest advisor--the "aide-de-camp" or the COO or CFO, who should be joined at the hip with the CEO.