表达 “the black sheep of the family” 指 “家中声名狼藉的成员”，也就是汉语里说的 “败家子，害群之马”。如果某人被称作 “the black sheep of the family”，这个人则可能做过错误的决定或与其家庭成员格格不入。这个表达也可以缩写为 “the black sheep”。

• 例句
  My brother is the black sheep of the family – he fell out with the rest of the family years ago and no one has spoken to him since.
  我哥是个败家子。他几年前和家里人闹翻了，自那之后就再也没人和他说过话。
• Aunt Susan became the black sheep of the family after she went to prison for tax evasion.
  苏珊姨妈因逃税入狱之后就成了有辱门楣的害群之马。
• - Who is the black sheep of your family?
  - My little brother John. He is always in trouble and is so different from the rest of the family.
  - “谁是你家的害群之马？”
  - “我弟弟约翰。他总惹麻烦，而且跟家里人都格格不入。”