Based on an anal explosion during the civil war in 1386, Capt. Donald Rumkinson of the 3rd dragoons lost ten of his best infantry men to bum wee when they were caught short and shot by the enemy whilst their rear ends were exposed. It is basically pissing from the arse and can strike at anytime, but is usual after a heavy night of booze, boot and greasy food.

A rather disgusting liquidy form of faeces passed out the rear end, usually after a night on the piss when one has consumed more liquid than donner kebabs.

after anal sex when the cum comes out off the asshole :D

The act of pissing inside someones anal during sex, the reciver then lets out the piss so is now pissing from the bum.

often said by bearded weirdos trying to impress schoolgirls. Absolutely no idea what it is supposed to mean but would guess that it is something to do with the rear end and urine