Jack Fish-ing is when you or another person eats food very loudly in an online call. This can apply to the crinkling of chip bags or the slurp of soup amongst other things.
Tony was eating ships so loud on Skype, I couldn't concentrate on my game. He was totally pulling a Jack Fish/Jack Fish-ing.
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.