"hacky sack" meaning in English

{
  "etymology_text": "A trademark of Wham-O. First use appears c. 1977. It uses a reduplication of the word sack with the word hacky; a hack, in the game's terminology, is akin to a point, and happens when every player in a group successfully passes the footbag.",
  "forms": [
    {
      "form": "hacky sacks",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "hackysack",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "hackeysack",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "hacky-sack",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "Hacky-Sack",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "hacky sack (countable and uncountable, plural hacky sacks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "langcode": "en",
          "name": "Games",
          "orig": "en:Games",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "95 5",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "88 12",
          "kind": "other",
          "name": "English genericized trademarks",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "88 12",
          "kind": "other",
          "name": "English reduplications",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "61 39",
          "kind": "other",
          "name": "English rhyming compounds",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "85 15",
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "94 6",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "95 5",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "85 15",
          "kind": "other",
          "name": "Terms with Russian translations",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "100 0",
          "kind": "other",
          "langcode": "en",
          "name": "Sports",
          "orig": "en:Sports",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A game or activity in which one or a group of players try to keep a footbag off the ground using only their feet."
      ],
      "id": "en-hacky_sack-en-noun-OiXiwXPE",
      "links": [
        [
          "games",
          "game#Noun"
        ],
        [
          "game",
          "game"
        ],
        [
          "activity",
          "activity"
        ],
        [
          "footbag",
          "footbag"
        ],
        [
          "feet",
          "foot"
        ]
      ],
      "raw_glosses": [
        "(uncountable, games) A game or activity in which one or a group of players try to keep a footbag off the ground using only their feet."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "games"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "ref": "2008, Wally Lamb, The Hour I First Believed, Ch.3, at p.74",
          "text": "At the food court, I bought a turkey sandwich and another coffee. As I ate, an entourage caught my eye: four Buddhist monks, camped at the periphery of the food court seats, about thirty feet away. Shaved heads, maroon and pumpkin-colored robes. Each was smiling, even the one who slept. You'd think monks would be wearing sandals, wouldn't you? But these guys were wearing what I wear: Nike sneakers, Timberland boots. Two were horsing around with a Hacky Sack. Another was chatting quietly with a black woman in a Chicago Bulls sweatshirt."
        }
      ],
      "glosses": [
        "The footbag used for such a game."
      ],
      "id": "en-hacky_sack-en-noun-aDI5uvkN",
      "raw_glosses": [
        "(countable) The footbag used for such a game."
      ],
      "tags": [
        "countable"
      ],
      "translations": [
        {
          "_dis1": "43 57",
          "code": "ru",
          "lang": "Russian",
          "lang_code": "ru",
          "roman": "soks",
          "sense": "game",
          "tags": [
            "masculine"
          ],
          "word": "сокс"
        }
      ]
    }
  ],
  "wikipedia": [
    "Wham-O"
  ],
  "word": "hacky sack"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English genericized trademarks",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English reduplications",
    "English rhyming compounds",
    "English uncountable nouns",
    "Entries with translation boxes",
    "Pages with 1 entry",
    "Pages with entries",
    "Terms with Russian translations",
    "en:Sports"
  ],
  "etymology_text": "A trademark of Wham-O. First use appears c. 1977. It uses a reduplication of the word sack with the word hacky; a hack, in the game's terminology, is akin to a point, and happens when every player in a group successfully passes the footbag.",
  "forms": [
    {
      "form": "hacky sacks",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "hackysack",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "hackeysack",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "hacky-sack",
      "tags": [
        "alternative"
      ]
    },
    {
      "form": "Hacky-Sack",
      "tags": [
        "alternative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "hacky sack (countable and uncountable, plural hacky sacks)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English uncountable nouns",
        "en:Games"
      ],
      "glosses": [
        "A game or activity in which one or a group of players try to keep a footbag off the ground using only their feet."
      ],
      "links": [
        [
          "games",
          "game#Noun"
        ],
        [
          "game",
          "game"
        ],
        [
          "activity",
          "activity"
        ],
        [
          "footbag",
          "footbag"
        ],
        [
          "feet",
          "foot"
        ]
      ],
      "raw_glosses": [
        "(uncountable, games) A game or activity in which one or a group of players try to keep a footbag off the ground using only their feet."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "games"
      ]
    },
    {
      "categories": [
        "English countable nouns"
      ],
      "examples": [
        {
          "ref": "2008, Wally Lamb, The Hour I First Believed, Ch.3, at p.74",
          "text": "At the food court, I bought a turkey sandwich and another coffee. As I ate, an entourage caught my eye: four Buddhist monks, camped at the periphery of the food court seats, about thirty feet away. Shaved heads, maroon and pumpkin-colored robes. Each was smiling, even the one who slept. You'd think monks would be wearing sandals, wouldn't you? But these guys were wearing what I wear: Nike sneakers, Timberland boots. Two were horsing around with a Hacky Sack. Another was chatting quietly with a black woman in a Chicago Bulls sweatshirt."
        }
      ],
      "glosses": [
        "The footbag used for such a game."
      ],
      "raw_glosses": [
        "(countable) The footbag used for such a game."
      ],
      "tags": [
        "countable"
      ]
    }
  ],
  "translations": [
    {
      "code": "ru",
      "lang": "Russian",
      "lang_code": "ru",
      "roman": "soks",
      "sense": "game",
      "tags": [
        "masculine"
      ],
      "word": "сокс"
    }
  ],
  "wikipedia": [
    "Wham-O"
  ],
  "word": "hacky sack"
}