Uncle Tom
it's difficult to imagine being knowledgeable enough of another person's behavior and motives to use this term. As well as being sexist (there is no equivalent for a woman), it can be highly racist. Possible alternatives include: collaborator, traitor to one's race, toady, sycophant, stooge, backscratcher, bootlicker, puppet, rubber stamp, dupe, doormat, flunky, subservient/obsequious person. Today we might speak of someone who has been co-opted.
