Refers to someone who looks like one of your friends, but if they were 30 years older and had completely let themselves go.
Much like a version of Your team for doppelgangers, when you spot someone that looks like a fatter, hairier, and/or older version of your friend, you can then say you saw their "Sloppelgänger".
Dude 1: Yo Mike, totally saw your Sloppelgänger today on the subway. I'm pretty sure he was homeless...but it was like SAME FACE.
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.