wall wart: n.
A small power-supply brick with integral male plug, designed to plug directly into a wall outlet; called a ‘wart’ because when installed on a power strip it tends to block up at least one more socket than it uses. These are frequently associated with modems and other small electronic devices which would become unacceptably bulky or hot if they had power supplies on board (there are other reasons as well having to do with the cost of UL certification).
I was so wondering what the hell a wall wart is..
Yeah I try to put them at the end of things so they can't take up the two sockets. Or upside down on walls (when they only have 2 connectors) so that the bottom socket is still free.
.....Bloody bastard things! 
