copycat

copycat
noun
  1. (informal, derogatory)(especially in children's use) a person who copies another's behaviour, dress, or ideas
    (非正式, 贬)(尤指孩子用语)盲目模仿他人行为(服饰,思想)的人;仿效者
    ■[as modifier]denoting an action, typically a crime, carried out in imitation of another
    模仿他人的行为(一般指罪行)
    copycat killings.
    模仿他人的谋杀。
英语宝典
考试词汇表