sacktap 

the quick flick of one's fingers making contact with another's ballsack, causing a delayed, but tremendous pain in the lower stomach region of one's body.

Brandon sacktapped Jerry and made him cry.

sacktap by Daniel Tyrrell July 20, 2004

sacktap 

a slight and subtle flick of the wrist to a man's testicles, causing him to fall to the ground in pain, and occasionally cry.

I sacktapped Luke, and now he can't have children.

sacktap by Jo-dizzle December 28, 2005

sacktap 

When somebody sneaks up on a guy and lifts his foot quickly (but not a kick) and taps his balls.

"I snuck up behind jack and tapped him"

sacktap by Zacharias May 13, 2005

Mexican Sacktap 

A hypothetical situation in which a large ring of gay men engaging in anal sex perform Newton's balls, creating a chain reaction that, with a little effort, can continue indefinitely around the circle like a Mexican Wave around a sporting field. There are no recorded occurrences of this.

'I started a Mexican Sacktap but it didn't make it around the circle because Bastian wasn't thrusting in time.'

Mexican Sacktap by Authur C. Commons April 20, 2008

Soviet Sacktap 

When an individual is shot directly in the testicles with a rubber bullet from a 12-gauge shotgun while bent over so that the scrotum is in the outstretched and dangling position.

"When that protestor bent over I Soviet sacktapped his ass."

Soviet Sacktap by Sleazy Beazly January 31, 2021

Sactap 

To perfect the art of hitting a male in the testicles using a whiplike motion of the wrist, for ones own entertainment.

Dude, I sactaped Cooper on Monday, it was so funny.

Sactap by Spencer S. May 25, 2005

sack tap 

A trick played on a fellow athlete where the open hand smacks the target's testicles with the knuckles in a sharp, wrist flicking motion.

"Dude, I sack tapped Brandon, and now he has the whole team trying to sack tap me"

sack tap by Chris M July 7, 2004