The term Hacky Sack is the trademarked name of a type of footbag, but has since become the generic term for either the foot bag itself or the game itself.
Hacky Sack was created in 1972.
In the kindle version of the lightning thief on 160, right after they leave to go on the quest. Percy and Annabeth are playing hacky sack with an apple. "We got restless waiting for the bus and decided to play some Hacky Sack with one of Grover's apples. Annabeth was unbelievable. She could bounce the apple off her knee, her elbow, her shoulder, whatever. I wasn't too bad myself. The game ended when I tossed the apple toward Grover and it got too close to his mouth. In one mega goat bite, our Hacky Sack disappeared- core, stem, and all." Riordan, Rick (2009-05-02). The Lightning Thief (Percy Jackson and the Olympians) (p. 160). Disney. Kindle Edition.
Ball sack IS a slang term. See the related question for the whole list.
a gunny sack is a sack made of gunny or burlap
A Sack for pooping
Hacky Sack was created in 1972.
The hacky sack was invented in China. Another name for hacky sacks are footbags.
It appears to be a Hacky Sack term, not a medical term.
1982
ati
i don't now
5 billion bounces!
50 Pounds
yes! i had to do it in P.E.
hacky sack
"Hackin' the Sack" now known as Hacky Sack
Yes there are rules to the game hacky sack. No hands is one of the rules.For more rules and basic moves you can visit http://www.x-village.com/fbinfoframe.html.