A dude with a ballsack that's so tight, so taut, it's like a stretched piece of leather. It never hangs and almost appears as if there is no scrotum at all. When seen in porn, one asks "Where's that dude's sack? Ewwwww!"
What's with Roger's man sack? It's like he has a cock only. He's got ironclad nads brooohhh. Those nuts are always taut.
Ironyclad as always, her eulogy for her mother began, "You all know mom? She sends her regrets at being unable to attend today's festivities", but the mourners all understood it was her defense against grief.
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.