Wiktionary
n. (context idiomatic English) a big setback or disappointment
Usage examples of "kick in the balls".
He tossed a straight right at Whaddayamean Dean which caught him on the left temple and knocked him free of the Mexican and over the kneeling body of Roscoe Rules who was hoping desperately he wouldn't puke from the kick in the balls.
On the way to the car, she stopped to give Tommy Sifakis a kick in the balls.
That was a kick in the balls, but the confirmation on the Vogel extortion front made up for it.
But giving the Lizards a good swift kick in the balls counted for more in his book.
You'd expect that as much as a samurai would expect a kick in the balls.
Only by the time they get back up to pay us another social call, not only will we all be gone but the fort will be, too, and that ought to be a real kick in the balls to them.
It must have been a real kick in the balls to Roberts when they gave Bellmon a star and made him Director of Army Aviation.