To have sex and never call that person again, especially if she's a high school girl

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."

A person who steals all the credit for anything anyone does. And also steals yo wife. Or girlfriend, or any lady covered in chocolate.

To shamelessly self-promote a movie, redirecting any conversation towards the topic of the movie.

The act of having sex with someone and failing to continue communication after the act.

To have sex with the lack of a callback.

To have sex with someone, and then never speak to them again.