I don't use or like the n word but I will say my friend girls, relatives and some of my coworkers call each other Bs, heffas and heauxs all the time and fall out laughing about it. We think it's funny. One of my best friends is a guy from Mexico and we tease eachother with racial stereotypes and find it hilarious. But I will say we don't do it in front of any old body.
Now let someone I'm not cool with call me something like that and it not go over well at all.