a toy person or animal made from a decorated sock or similar piece of material that you can put your hand inside and move with your fingers

She made a short animated film acted out with sock puppets. 她制作了一部用袜子手偶表演的动画短片。

someone who is controlled by another person and made to say or do things that person wants said or done

The reader quickly realizes that Mr. Swift is using Paula as a sock puppet for his own purposes. 读者很快就意识到，为了达成自己的目的，斯威夫特先生把宝拉当做了傀儡。

on the internet, a false identity (= a name and character) created by someone in order to express views that they want to have expressed, for example praise or support for a particular organization or person

Clearly the poster is a sock puppet. 这个帖子很明显是个网络马甲放上去的。

So you admit setting up sockpuppet accounts on Wikipedia? 所以你承认在维基百科上建立了马甲账号？