Whats up with the word *****?

whats up with that word im white and my bf is black and when he see's his freinds r w/e he be like wat up my ***** and all that stuff and sometimes he sound really stupid and i be like why would u want to call someone that and like if a white person say that to a black person it look like they be wanting to lose they mind they be like who u calling a ***** you stupid as cracker abd i be liike dawm sometimes yall be looking so stupid when u say something like they suppose to be live just because they call eachother ***** so i just want to know whats up with that word?