/ Dictionary / Index H Hacky Sack: Meaning and Definition of Find definitions for: Hack'y Sack" Pronunciation: (hak'ē), [key] a small leather beanbag juggled with the feet as a game. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hackwork had Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language