Noun. Accidentally clicking "send" in an email or text before one has completed it or finished editing it, resulting in a less satisfying or embarrassing experience for both sender and receiver. At best, results in confusing truncated messages or typos; at worst, results in social, economic or political suicide.
When trolling for a booty call late at night, Andrew forwards the same text to multiple women. He frequently suffers from premature sendulation, accidentally leaving the wrong woman's name in the text and ensuring instant rejection.
Caitlin didn't realize she'd committed premature sendulation when she sent an email thread to her manager without stripping some choice words about her boss from the thread. She was fired.
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.