Someone who is seen as generic and one dimensional, with little depth or individuality to their character. Typically someone who strives to 'fit in' to be as popular as possible, often not being their true self. Can also simply mean someone who is seen as being a stereotypical character in any kind of way.
"My friend only watches Reality TV and makes fun of anything that isn't the current fashion........he's a real cardboard cutout c**t"
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.