This is the common happening of someone laughing loudly and exuberantly (in other words scandelously) for a LONG period of time (without the use of laughing gas) when neither the person laughing or the observer(s) know what caused the laughing in the first place.
Laughtyping when you're typing, chatting or texting someone and have that stupid look on your face like you're loving everything the other person says
Person 1: "dude who were you texting? You had a stupid look on your face"
Person 2: "my gf. I was laughtyping. We both agreed on something "
Person 1: "what's that"
Person 2: "that you're a stupid dick"
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.