Do you remember the movie 3 Idiots and its iconic scene where Rancho was asked to define a machine?
Of course you do!
At first, Rancho gave a simple up-and-down movement of his pants zip, but his professor wasn't very amused. Later, Chatur responded with a jargon-filled, textbook definition: "Sir, machines are any combination of bodies so connected that their relative motions are……..!”. The definition by itself is so mind-boggling that it requires multiple rewinds to fully understand what it means.