Wiktionary
hackeysack
alt. 1 A non-competition sport in which a small sack, or "hack", full of rice or sand is kept from falling to the ground by using any part of the body except the arms. 2 The sack used in this sport. n. 1 A non-competition sport in which a small sack, or "hack", full of rice or sand is kept from falling to the ground by using any part of the body except the arms. 2 The sack used in this sport.