To be "too smart by half" (also common is "too clever by half") is to be too smart for one's own good, meant either literally or ironically. As an idiom, it is usually sarcastic. The phrase has a wide range of potential uses; for instance, it can mean:
1.) Something so complex that it's self-obfuscating.
2.) A seemingly clever action that is in fact foolish.
3.) Logically accepting something as necessary that isn't.
4.) Overanalysis.
5.) Elitism (see ivory tower).
Caused by overworking the Central nervous system of the brain. Eventually certain parts of the body start to shut down, usually starting with the left foot and working its way up the body. Although T.S.D. is very rare, there have been 37 recorded deaths.
Stephen Hawkings is the most well known person who suffers from T.S.D. (Too smart Disease) Another wellknow case was Franklin Roosevelt
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.