"slack suit" meaning in English

{
  "forms": [
    {
      "form": "slack suits",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "slack suit (plural slack suits)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Clothing",
          "orig": "en:Clothing",
          "parents": [
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1968, Carl Ruhen, The Key Club, Sydney: Scripts, page 16:",
          "text": "She was wearing a black and white striped slack-suit with flared bottoms.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A comfortable woman's casual outfit consisting of a pair of slacks and a jacket top or sports shirt typically of the same material and design."
      ],
      "id": "en-slack_suit-en-noun-9uiM6xjC",
      "links": [
        [
          "casual",
          "casual"
        ],
        [
          "outfit",
          "outfit"
        ],
        [
          "slacks",
          "slacks"
        ],
        [
          "top",
          "top"
        ]
      ]
    }
  ],
  "word": "slack suit"
}

{
  "forms": [
    {
      "form": "slack suits",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "slack suit (plural slack suits)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Clothing"
      ],
      "examples": [
        {
          "ref": "1968, Carl Ruhen, The Key Club, Sydney: Scripts, page 16:",
          "text": "She was wearing a black and white striped slack-suit with flared bottoms.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A comfortable woman's casual outfit consisting of a pair of slacks and a jacket top or sports shirt typically of the same material and design."
      ],
      "links": [
        [
          "casual",
          "casual"
        ],
        [
          "outfit",
          "outfit"
        ],
        [
          "slacks",
          "slacks"
        ],
        [
          "top",
          "top"
        ]
      ]
    }
  ],
  "word": "slack suit"
}