This term originates from the hit movie, S.W.A.T. On a routine mission, the swat team is forced to breach a house and remove a potentially dangerous man. When the team sticks a giant hook into the wall to pull it off, the man mentions something about robutt aliens.
Did you hear, the robuttaliens have teamed up with Al Quida.
Its a hard, fine pice of ass. From Robot and Butt = RoButt
Me; Look at that robutt. That ass the bomb. If a car hit her it'll bounce the fuck back!
Ali Demir; Yeah! I'd fuck that ass anytime. HEEY! That's my mom!!
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.