A compound word made from the words "balls", "back", and "action". Ballbaction is when one male playfully accepts a piggyback or shoulder ride from someone, and instead of mounting them smoothly and majestically, slams their testicles into the back of the person giving the ride.
The act upon a male strolling or pacing quickly through a field of dead babies, to which upon he shall state down at his penis and realise 90% of all the blood in his body has rushed to his penis.
“Oi Gilbert, I dare you to walk through this field of dead babies and don’t get a Baerection!”
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.