Pants that fit so tight that when they are removed there are fecal stains on them because, due to there tightness, they came into contact with the anal orifice and were thus stained with feces.
Yo, gurl!! You be lookin' fine as all hell in yo pooper pants! Know what I'm sayin'?
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.