An uncontrollable urge to shit in a flowing motion, Starting off as a stomach churning, gut renching feeling that is rapidly followed by a run to the nearest Restroom where severe sweating and panic ensues as the uncontrollable flow of BUMWEE pours out of your ass. After this painful experiance the Sting of the ring of fire is the reminder of what you have just experianced, other than the Pebble dashed pan you leave behind.
The liquid which appears during toilet backwash. Carries with it an awful and awesome smell that can eliminate a grown man. Can often be placed into normal conversation to add hilarity unknown to bystanders.
Tramp: "Can I have a wee bite o yer sandwich?"
Lewis: "Yeah, it's a bit bumwee though. Thats a nice bumwee you've got."
Tramp: "Is yer friend takin' the piss?"
Also
"My GOD! It smells like bumwee in here! The smell is like getting hit in the face. WITH A SHIT!"
Being violently penetrated in the anus so many times where the anus has literally become a "bumwreck". It can also be referred to someone who has taken excessive anal penetration/beating.