"kitty crack" meaning in English

{
  "etymology_text": "In reference to cats' fondness for the plant; see crack (“form of cocaine”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "kitty crack (uncountable)",
      "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": "lifeform",
          "langcode": "en",
          "name": "Ajugoideae subfamily plants",
          "orig": "en:Ajugoideae subfamily plants",
          "parents": [
            "Mint family plants",
            "Lamiales order plants",
            "Spices and herbs",
            "Plants",
            "Shrubs",
            "Trees",
            "Foods",
            "Lifeforms",
            "Eating",
            "Food and drink",
            "All topics",
            "Life",
            "Human behaviour",
            "Fundamental",
            "Nature",
            "Human"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "cat thyme (Teucrium marum)"
      ],
      "id": "en-kitty_crack-en-noun-EkLpEl8y",
      "links": [
        [
          "cat thyme",
          "cat thyme"
        ]
      ],
      "raw_glosses": [
        "(slang) cat thyme (Teucrium marum)"
      ],
      "tags": [
        "slang",
        "uncountable"
      ]
    }
  ],
  "word": "kitty crack"
}

{
  "etymology_text": "In reference to cats' fondness for the plant; see crack (“form of cocaine”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "kitty crack (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English uncountable nouns",
        "Entries using missing taxonomic name (species)",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Ajugoideae subfamily plants"
      ],
      "glosses": [
        "cat thyme (Teucrium marum)"
      ],
      "links": [
        [
          "cat thyme",
          "cat thyme"
        ]
      ],
      "raw_glosses": [
        "(slang) cat thyme (Teucrium marum)"
      ],
      "tags": [
        "slang",
        "uncountable"
      ]
    }
  ],
  "word": "kitty crack"
}