When you are either bored with a conversation you're having with someone or just want to end it you tell the person"you're wasting my daytime minutes."
It refrences a limited amount a minutes you can use on your cell phone often refered to as anytime or daytime minutes but applies it to conversation in this case.
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.