Cunt Barrier

When you and a mate become close enough that you can gratuitously call each other a cunt as a joke, and neither of you are offended in the slightest.

Me: Sup my favorite cunt in the world!
Friend: Oh hey, how was your day you daft cunt?
Me: It was long you absolute cunt!
Friend: We don't call each other cunts very often, do we you cunt?
Me: Haha we broke the cunt barrier 2 years ago you colossal cunt :)