A person who is usually really stupid. Someone who makes mistakes and doesn't realize it. A person that is clumsy, stupid, or just plain weird. But you know, you can be a stupidhead and still be cool and fun. It just depends.
"Well, he broke up with you, and he also took pictures of himself naked. What a stupidhead."
An Insult. A stupid stupidhead is someone who either looks like a stupid stupidhead, or is so stupid they have no clue that they are either acting like a stupid stupidhead or are a stupid stupidhead.
Rob was so bad at Clash Royale that his teammate Jonah called him a stupid stupidhead! Bawk Bawk Ba-KAW!
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.