Imagine you want to live in Dave's house. To get it, you walk in and openly do a massive shit in his front room. Dave moves out. Thing is, your shit smells so bad you decide you don't want it after all. Leaving the house, and the rest of the street for that matter, a desolate rancid mess.

This is known as doing 'a Boris'.

Invented in Borat's movie. It is said, when something great happens.

Someone who is really bloody useless or a liar and generally a waste of space.