A poohard is when an erection occurs after poo rubs up against one's sphincter. In so doing, causes a poohard. This is similar to a boner. However it is cause by poo.
A poohard is related to its distant cousin. Peehard.
Johnny had a spontaneous erection, but then he realized he only had a poohard. So he got rid of the poohard by using the bathroom.
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.