When your colleague or supervisor sneaks up behind you and stands so close to you while you're seated at your desk, that their balls are resting on your shoulder and you don't notice
Willidan almost laid a greek cheese out of shock when he realised that he was the victim of a stealth sack attack.
by netmonkey February 20, 2009

The assault of one's testicles from behind. Generally, the victim is bent over, however a standing attack up the legs is also commonplace.
Often times, the assailant will yell "back sack attack!" either at contact, or after the strike is complete.
Often times, the assailant will yell "back sack attack!" either at contact, or after the strike is complete.
Winding up for a kick, Ben positioned himself behind a bent-over Matt. Using mostly the flick of his foot unto the scrotum, Ben yelled "Back sack attack!" before Matt ever got the chance to react. Devolving into his fetal position, Matt sat writhing in pain.
by MrPistachio February 9, 2013

When doing your partner doggy style, your nut sack will smack wildy against your partner's ass/legs/whatever, and make a loud clapping sound.
by Mike DW February 19, 2008

This is when your ball sack starts itching so bad. That you have to attack your nuts violently to make the itching stop.
by Joey Bonadeuce September 29, 2018

Dude why are you limping?
i gave my girlfriend one mean blue sack attack, and i still havent recovered.
i gave my girlfriend one mean blue sack attack, and i still havent recovered.
by herbizzle December 29, 2007

The Snack Pack Sack Attack is quite simply, the result of a young man dipping his testicular sack (ball sack) into a snack pack (pudding), preferably tapioca (for the joy of texture), and then dipping that sack into a young womens mouth (teabag)
ball sack + snack pack + teabag = YES
ball sack + snack pack + teabag = YES
"Hey remember that time when little Billy passed out in the locker room and Coach Sourbee snack pack sack attacked his ass??"
"yeah, I heard they pressed charges or something"
"yeah, I heard they pressed charges or something"
by capitalG March 14, 2009

Jack jack sack attack
Jack jack sack attack
Jack jack sack attack
Jack jack sack attack
Jack jack sack attack
Jack jack sack attack
Jack jack sack attack
Jack jack sack attack
Jack jack sack attack
by Angishangi January 14, 2020
