touching one's genitals. can be used in various circumstances, e.g. sacktapper, sackmacker, sackslapper, et cetera. often used to insult one or to denote someone as a good friend.
didn't you, you sackTAPPER?
by Ryan September 23, 2003
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.
by Daniel Tyrrell July 21, 2004
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.
by Jo-dizzle December 3, 2005
if Someone makes a deal or a promise, saying sacktaps at the end means if they don’t live up to their word means a slap to the kids
Yeah mate I told you I’m gonna buy it. “Sacktaps” aww ffs bro my left nut still hurts from the last one.
by Laurelgang December 28, 2017
by Zacharias February 22, 2005
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.'
by Authur C. Commons April 20, 2008
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.
by Sleazy Beazly February 1, 2021