1. a black man considered to be excessively obedient or servile to white people.offensiveNorth American
▪ a person regarded as betraying their cultural or social allegiance:offensiveNorth American"he called moderates Uncle Toms"
Word Originmid 19th century (first referring to an enslaved black man): from the name of the hero of Uncle Tom's Cabin (1852), an anti-slavery novel by the American writer Harriet Beecher Stowe.
Uncle Tom is the title character of Harriet Beecher Stowe's 1852 novel Uncle Tom's Cabin. The character was seen in the Victorian era as a ground-breaking literary attack against the dehumanization of slaves. Wikipedia