A ridiculous phrase combining anal sex with a none anal orifice.
Popularity increasing after a competition on www.rllmukforum.com - a computer gaming forum - where a prize would be given to anyone using the phrase audibly on television. Google it, you can see it used on Youtube for it's first ever televisual viewing.
The man using it knew what he was doing and was not simply trying to stoke the fear around Manhunt at the time as some believe.
"Manhunt is a very violent game - it's a game that features people getting bludgeoned to death, people getting bummed in the gob, people getting garrotted..." - Mr Robert, host of Consolevania