A drug addict that spends his/her time stealing things from people or places to sell them, or "cluck" them on the street for a cheaper price to support their drug habit, especially if they target neighborhoods at late night hours."
"You can park your car inside my yard. Don't park it in the street 'cuz there's a bunch of cluckheads around this block jacking catalytic converters off people in the hood."
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.