When you've got a girl and your sure you're gonnaget laid one night, but don't. It is caused by either a) Shes scared or b) You're unattractive
Guy 1: So did you finally get laid by that chick you been with?
Guy 2: Nah man, I don't know why though
Guy 1: Oh, she put you under the pussybo effect
Guy 2:Dammit! WTF
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.