[Uncle Tom] n [Uncle Tom, pious and faithful black slave in Uncle Tom's Cabin (1851-52) by Harriet Beecher Stowe] (1922) 1: a black who is overeager to win the approval of whites (as by obsequious behavior or uncritical acceptance of white values and goals)
2: a member of a low-status group who is overly subservient to or cooperative with authority "the worst floor managers and supervisors by far are women ... Some of them are regular Uncle Toms --Jane Fonda" -- Uncle Tom.ism n
[2]Uncle Tom vi Uncle Tommed ; Uncle Tom.ming (1947): to behave like an Uncle Tom