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."
Anything that can be expressed in a less precise manner such as a number with an unnecessary amount of decimal points.
Hey man how precise should I go on this answer?
IDK we could work it out to 50 decimal points but that would be impractical, for our purposes the answer is roundable to 3 decimal points.