minstrel show
noun [ C ] uk/ˈmɪn.strəl ˌʃəʊ/ us/ˈmɪn.strəl ˌʃoʊ/
（美国内战前后）由白人化妆饰演黑人，以取笑黑人为主题的歌舞滑稽演出
in the past, an entertainment of dance, song, and jokes intended to make black people seem stupid and unimportant, popular before and after the American Civil War and performed by white people who wore dark make-up