Many of us have one. Some of us even have a few.
They're the friends you make in the workplace that are your 'ride or die' connections in your specific work environment. You go to one another when there's a drama, to have a little gossip or even for a laugh or some escapism.
They might even be people you feel comfortable airing your life frustrations with.
But according to some experts, our work wives might be making us lonelier than ever.
MM Confessions: Why I last cried at work. Post continues below.
The friendship recession.
According to US statistics, an increasing number of adults say they have few to no close friends.
And like a lot of social learnings from the US, this often eventually translates to Australian society sooner rather than later. Compared with four decades ago, Australians have almost half as many friends, and we catch up with our mates only about half as often.
The pandemic has some explaining to do in this arena. Following on from lockdowns and a drop in face-to-face versus digital connections, it turns out we haven't seen a vast improvement in rates of loneliness post-pandemic.
So how does this relate to work wives? Well, it appears that more of us are relying on our mates at work to fill this close friendship gap than ever before. But it's not as successful a bandaid as we might've assumed.