When you see a girl who is way hotter than the guy she is with, that is an unproportionately hot girlfriend. She is unproportionately hot compared to how hot he is.
Dude, your girl is a 10! But you, you're more of a 4. She is definitely an unproportionately hot girlfriend.
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.