We’ve all heard of the “Bro Code”.

That much revered set of rules that govern bro-mances. Like “bros before hoes,” ugh.

Or, if you’re in a shout, always pay your share. (Although that one applies equally to women – if your girlfriend shells out for an espresso martini, you better return that favour!)

The group in Sex and The City had their issues, but they knew the Girl Code was sacred. Source: HBO.

But what are the universal codes for women?

Are there rules that ensure the sisterhood has each other's backs?

You'd better believe it.

This week on Mamamia Out Loud, Monique Bowley, Mia Freedman and Kate De Brito break down the rules of the Girl Code.

Here's our suggested list. Feel free to take it to the tattoo parlour:

Watch: Rebecca Sparrow and Robin Bailey on friendship. Post continues below.

If a girlfriend breaches the Girl Code, you better ditch her quicker than you can say 'unfollow'.

What use is a girl-squad if they won't Insta-stalk your ex? You don't need someone like that in your life.

Have you ever broken the Girl Code?

You can listen to the full episode here: