Picking up a cheep hooker and driving her down the street. Whilst arriving several blocks later, you take a bill from your pocket, wipe your ass with it, stick it to her forehead, then drive off.
I picked this hooker that I thought looked good from behind, but low and behold I gave her the Cajun Bus Ticket.
I replied: "Well! I picked her up, drove a few blocks, got a $5 out of my pocket, wiped my ass with it, stuck it to her forehead, kicked her out of the car, and then drove off."
The act of a man and woman having sex tied to a chair placed at the top of a staircase, and after climax, tipping themselves down the stairs. Often referred to as "buying" a non-refundable bus ticket.
John: "Hey man, how did you get that scar on your leg?"
Paul: "My girlfriend and I decided to try buying a non-refundable bus ticket."
John: "Ouch, dude."