What is Sacktap?
1.
the quick flick of one's fingers making contact with another's
Brandon sacktapped Jerry and made him cry.
2.
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.
See
3.
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"
