sock puppet 马甲

A sock puppet is an online identity used for purposes of deception within an online community. It is a fake identity through which a member of an Internet community discusses or comments on oneself or one's work, pretending to be a different person, like a puppeteer manipulating a hand puppet. 

“马甲”是网络社区中为了隐藏身份而注册的ID。这是一种虚假的网络身份，论坛或社区用户通过“马甲”假装成另外一个人参与有关自己及自己作品的讨论或者评论，就像手偶演员操纵手偶表演一样。

Sock puppet英文本意为“袜子木偶”，最早出现在1959年。现在指出于欺骗目的而使用的虚假网络身份，比如人们在网络上经常使用“马甲”登录。