copycat

区别如下：

counterfeit 主要是指伪造，[例句]Are you aware these notes are counterfeit?

你觉察到这些钞票是伪造的吗？fake 指伪造、假装、冒充、篡改等意思。[例句]Fake designer watches are sold at a fraction of the price of the genuine article.

伪造的设计师名牌手表以真品若干分之一的价格出售。shoddy是指劣质的、做工粗糙的。[例句]I'm normally quick to complain about shoddy service

对劣质服务我通常会立刻投诉。copycat是盲目模仿者的意思，[例句]The Beatles have copycats all over the world. 披头士乐队的模仿者遍布全世界。