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1.
1) where your use torque in your wrist to whip someones area where their lower genitals are

2) Sack wack can also be a technicial name for the process in which homosexuals use the back of their hand to slap someones ball bag (nut sack).

3)can also be a sport
1) i gave him a good sack wack

2)i got this guy last night in bed by giving him a sack wack
af Talon 28. maj 2004
 
2.
The act of being wacked in the testicles by someone with a forcable back hander.
"hey did u just sack wack that guy"
af goy goy the great 19. november 2009
 
3.
To hit someone in the balls with the back of your hand generating power from a backswing of the stronger arm and finishing with a graceful flick of the wrist...
- From the Ancient Roman word 'sackuswakus' - meaning 'ruptured ballsack'
"you only get a sackwack if no one likes you"
af Unknown-Infinity 25. august 2006
 
4.
When you flick the ball sack of your mate with a downward flick of your hand using the tips of the fingers.
af aussi guy 8. maj 2011
 
5.
Masturbating in bed.
Timmy's mom is always telling him not to sack wack.
af Mike 6. januar 2005