Dipping one's balls into someones belly button which is filled with fresh warm cum. After the dip the dripping balls are slapped onto the other persons forehead.
Sally: Ryan swamp nutted me last night my belly button is still stuck shut and my head hurts.
When a person (male) reframes from showering for a long period of time and starts to develop a unbearable smell around their nut sack. On rare occasions stinging around the balls may also occur
Lindsey was about to give Chris some dome until she smelled his swamp nuts.
As if the vinyl seat and the lie detector hooked to my arm weren't cause enough for swampnuts, the detective also closed all the windows and brought in a space heater.
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.