Formally known as a machine with a blade swung vertically for beheading prisoners in ancient times, the word guillotine is now commonly used in western culture among gay youth. It is used as a bondage device for anal penetration among gay partners.
For example: "Hey big boy, look at this picture of me ass up in a guillotine Ms. Melendez husband took!"
Definitions include: A knob jockey is a man that likes to ride another mans cock . The term knob jockey is often used as a definition to explain to your piers what you think of another person normally used out of frustration or anger towards a another male.