Don't let Stang-up pussies fool you, CA-Mustangs is the largest and best car club in California for those who respect real American Muscle and don't degrade it with 22s and candy paint.
The term given to the matted and often short and curly clusters of hair in and around the asshole that are left entwined by residual faeces, not cleansed by a thorough ass wipe following a shit.
Damn Jake, I haven't had a shower for so long that I'm starting to form some mean mustangs!
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.