Nigga (originally spelt nigger) is an offensive term used towards black people (usually African-Americans), although it is often used by black people themselves to refer to other black people. It can even be used as a friendly term (e.g. when a black person says to another "You're my nigga!" it means your my friend/brother/homie etc.)
Similar words and phrases:
- Black
- Brother
- Homie
- Negro
- Nigger