Unloading a large amount of loose, runny stool in one push out your butt.

The act of extreme masturbation. You must "knock one out" whilst in close proximity to any of the following; Your mum, a nun, your boss, a member of parliament, George Michael. A person with capabilities to act upon catching you mid self-abuse obvisouly ups the ante. Ejaculation must be reached before your danger wank target comes (no pun intended) to investigate. The higher the chances of being discovered with one's pants down, pulling one's war face is obviously where the danger comes from. The more danger involved the harder (or softer) it is to complete the task in hand (snigger). The more dangerous the better. The chance of being arrested, pummeled by an angry father or having your hand severed by an arab's sabre means that you are a pro "Danger wanker."

having yourself and five of your closest buddies shit in somebody's toilette without flushing. That way the shitter will not flush and someone will have to scoop out the shit so that the toilet will flush again.

Two or more people dropping a pile of steaming two-flush corn-logs onto a willing (or alternately unwilling) participant. This act is like an amalgamation of bukkake and the cleaveland steamer.

When somebody opens their asshole and another person shits in it, they may pass the shit back and forth.

the act of a guy shoving his dick up another guy's ass

Much like tea bagging, except for the fact that it is done with the males balls in the woman's mouth, and not forehead as done in tea bagging.