All you need is two people and a victim. The first person holds the victim down and puts their feet up, then the second person comes in and punches the victim square in the butthole. It hurts like hell. Preferably done to the 5th grader who lives across the street that tells on you all the time. One day he'll learn.
Dude we held down jimmy last night and gave him an Uncle Leroy and he cried like a bitch.
Shut up or you're getting a straight shot to your pooper...uncle leroy style!
I tried giving my wife the Uncle Leroy last night for not washing the dishes.