When a man blows a load up into the vaginal cavity so hard that it sticks to the back of the uterus, and doesn't get expoliated until menstration.
Amanda: Dude, i cockalocka'd in Mary's vagina on a scary mountain last night.
Courtney: She will be feeling that when its her time of the month.
Amanda: I hope so. shes a fucking skank
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.