In the book "Born a Crime" by Trevor Noah, he describes growing up in apartheid South Africa and the use of various slurs and derogatory terms by people of different races and ethnicities. However, he does not mention any specific slur or term that was commonly used by Black people against one another. Instead, he describes how people of different racial and ethnic groups in South Africa were pitted against each other and encouraged to view one another as enemies, leading to a culture of fear, suspicion, and distrust. Noah emphasizes the importance of empathy, understanding, and breaking down barriers between different groups of people in order to promote unity and healing.