“ The contemporary meaning of nigga has two distinct definitions. One means friend, brother, etc. and is mostly used in greeting, such as "Yo wassup my nigga", in this case the word nigga is used in a friendly way.
On the other hand, nigga can also be an insult. Statements such as "F*ck you bitch ass nigga" and "That nigga stole my iPod" are used when one is angry, frustrated, etc. So it all depends on the mood: good mood and nigga means friend, bad mood and nigga means enemy. ”