Big Penis.

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 penis large enough that it could hurt someone, not only during the act of sexual intercourse, but also by slapping it across some dirty shylock's face.

A term used by military personnel to describe the threaded funnel that attaches to five gallon fuel cans which is long and resembles the shape of said animal.

Man with very large penis
also hung like horse
;)

Army slang for a removable, bendable metal spout used to pour gas from USGI jerry cans

1. An abnormaly large penis.
2. Derogatory word - used as a adjective.