From Longman Dictionary of Contemporary EnglishUncle TomUncle Tom /ˌʌŋkəl ˈtɒm $ -ˈtɑːm/ noun [countable] American EnglishSSRINSULT a black person who is too respectful to white people – used to show disapprovalOrigin Uncle Tom (1800-1900) Uncle Tom black slave in the book Uncle Tom's Cabin (1852) by Harriet Beecher Stowe
