1. To make to run or flee, put to flight, drive away

2. To run swiftly in order to catch a person or thing, to run after

2a. To press on: figuratively of one who in a race runs swiftly to reach the goal

2b. To pursue (in a hostile manner)

3. In any way whatever to harass, trouble, molest one
to persecute

3a. To be mistreated, suffer persecution on account of something

4. Without the idea of hostility, to run after, follow after someone

5. Metaph., to pursue

5a. To seek after eagerly, earnestly endeavour to acquire

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."