Mario Karting can be observed when an individual attempts to drive a vehicle while under the influence of various narcotics & is most commonly associated with "candy flipping".
Although LSD & MDMA are the base ingredients for a true Mario Karting experience this can be further enhanced by adding to the mix such marvels as Valium, Nitrous Oxide & Marijuana Leaf - this list is not exhaustive.
Jimmy thought it'd be a good idea to go Mario Karting after a wild night out. He turned up the dial on his stereo & decided on some filthy ragga jungle for the ride. The tunes were banging & the roads were swerving but Jimmy thought he was doing just fine. His foot was down & with him bearing down on the destination he was seeking all of a sudden out of nowhere... WHAM. Poor Jimmy became the "Madcapped Parked Car Killer Man".
It is said of the situation where a person has the bad luck to make contact with his testicles against an undefined surface or object, intentioned or not.
Given the nature of the word, it is more appropriate to design cases where the interaction is made with a moving object, for example, a ball.
Although it is extremely painful for the victim, it tends to be considerably funny to people who witness it.
Today in the baseball game the pitcher took a nutshot; the baseball hit him in the nuts.
Man, I just watched the funniest nutshot video ever.