1. Round flat poop resembling the shape and size of a table tennis paddle. Not to be confused with Browns Flat, the rural community in Kings County, New Brunswick, Canada.
"I've been shitting out brown flats ever since I lost a table tennis tournament and Jerry shoved the flat side of the paddle up my ass."
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.