Uncle Tom
noun [ C usually singular ] offensive disapproving uk/ˌʌŋ.kəl ˈtɒm/ us/ˌʌŋ.kəl ˈtɑːm/
汤姆叔叔（指对白人曲意逢迎或逆来顺受的黑人）
a black person who is considered to be too eager to agree with white people or too willing to be treated in a way that is not equal to white people