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A method of navigation superior to GPS, which utilizes the measurement of relative air-current temperature. The method involves the application of saliva to a male’s scrotum by a female’s tongue. The scrotum is then placed outside the window of a moving vehicle. Air currents are analyzed via temperature changes detected in the epidermal layer of the scrotum. A normal vector corresponding to the isothermal region with the lowest relative scrotal temperature is deemed the “sacknav” vector. The sacknav vector always points parallel to the direction of final destination, via the path of least resistance.
Orion used sacknav to successfully navigate the roads of Vancouver.
sacknav by matricks April 26, 2009
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

sacknasty 

Bag lunch, usually consists of two warm bologna sandwiches, a bruised apple or orange, and a small bag of regular chips. If you're lucky you might get zebra cakes, all in a brown paper bag. Most of the time sandwiches go in first so they get smashed.
I'll trade you my sacknasty for your cheeseburger?
sacknasty by Jojwjwjejej December 22, 2013

Sackapolt 

When your male friend stretches out his scrotum skin then gets you to place a lolly of your choice on top of the ball bag simulating a sling shot. Once the lolly is in place simply tap underneath the stretched out skin ( three fingers works best) with enough force to dismount the lolly into one's mouth.
Hey Damian let's show everyone the sackapolt trick to get this party started
Sackapolt by Abbstar26 September 26, 2019
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

Sacktaps 

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.
Sacktaps by Laurelgang December 28, 2017