When a male go's to work on a very attractive female which is also known as tappin' dat ass. Many highschool students use this in their dictionary to seem cool to their peers.
1: Yo i was Tappin that ass all night she went to work on last night son.
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.