"liquid X" meaning in English

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      "expansion": "liquid X (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Recreational drugs",
          "orig": "en:Recreational drugs",
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            "Drugs",
            "Matter",
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      "glosses": [
        "The recreational drug GHB."
      ],
      "id": "en-liquid_X-en-noun-3boxJ-NO",
      "links": [
        [
          "GHB",
          "GHB"
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      "raw_glosses": [
        "(slang) The recreational drug GHB."
      ],
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        "slang",
        "uncountable"
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  "word": "liquid X"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Recreational drugs"
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      "glosses": [
        "The recreational drug GHB."
      ],
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        [
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      "raw_glosses": [
        "(slang) The recreational drug GHB."
      ],
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        "slang",
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  "word": "liquid X"
}