Sockpuppet

A sockpuppet is an account created by somebody who already has an account. There are four variants of it:

Sockpuppet for reasons of amusment and messing with others
Sockpuppet for bureaucratic reasons; see Diplomacy Bot.
Sockpuppets to circumvent a kick or ban, which is a bannable offense
Hiveminds: For examp, example, Hermanubis is Imajin's sockpuppet, and Steffen and Kabraloth are Susano's sockpuppets. And we all are just sockpuppets of Ian. For realz !

In fact, Aldroud once made a sockpuppet named sockpuppet after his ban. Didn't help either.