An extremely tiresome and useless twat of a person who, with an over inflated sense of self importance, makes the simplest of situations difficult. This is done by oppressing listeners with the shite that tumbles out of their mouth.
"Damn that meeting was boring. The new guy went on and on about those unwashed cups in the office, what a fucking weary bawbag!"
This can also be applied to unpleasant situations especially those given to one person by another,
"Sorry mate i can't come out as the wife has told me to paint the bedroom, it's a pile of weary bawbag."