Uncle Tom
1. noun
a black person who curries favour from whites through obsequious, fawning behaviour. In recent US history, Supreme Court Justice Clarence Thomas has attracted the 'Uncle Tom' label more than any other black American, in part due to the irresistible Tom-Thomas pun US, 1922
2. verb
(used of a black person) to try to curry favour with white people by obsequious behaviour US, 1937