1. A common side effect following a large consumption of fat. Usually associated with nausea, heartburn, indigestion, upset stomach, and explosive diarrhea.
2. A gang up of several morbidly obese citizens who raid small gas stations and steal their stashes of Twinkies.
"Yo n1gg4, I ate dis smoked turkey leg at my lady's parent's house the otha night and I got a muthafuckin' fattack. I was sittin' on their Toto for forty-five minutes and it smelt like toxic, dawg."
Cashier: "I dunno what happened, man. They just came in, knocked everything down, broke the windows, stole all the Twinkies and left... There was nothing I could do to stop them. I was so shocked at their agility, man."
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.