Exceedingly frugal, ridiculously cheap, unwilling or unable to let go of money when one should

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."

Cheap sonofabitch. Will argue at length why s/he shouldn't have to pay for something. Mr. Pink from Resevoir Dogs. Often has few if any other friends because of reputation for cheapness. Frugal beyond practicality, cheap for its own sake.

The saying is in reference to an earlier version of the US Nickel, which had a picture of a buffalo on it. The phrase is sometimes updated as: "He'll squeeze a nickel till a booger flies out of Jefferson's nose."