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 21, 2009
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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.
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
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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.
Dude, I could hear your nut sack attack through the wall last night.
by Mike DW February 19, 2008
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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 30, 2018
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when you wack your sack against the wall of a vagina until it turns blue.
Dude why are you limping?

i gave my girlfriend one mean blue sack attack, and i still havent recovered.
by herbizzle November 6, 2007
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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
"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"
by capitalG March 14, 2009
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Jack jack sack attack

Jack jack sack attack
Jack jack sack attack

Jack jack sack attack

Jack jack sack attack
Angus:Hey Athur guess what

Athur:what
Angus:jack jack sack attack

Athur: shut up bean
by Angishangi January 14, 2020
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