"sleep dep" meaning in English

{
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      "expansion": "sleep dep (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "English entries with incorrect language header",
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Sleep",
          "orig": "en:Sleep",
          "parents": [
            "Body",
            "Human",
            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "sleep deprivation"
      ],
      "id": "en-sleep_dep-en-noun-x6P6~Dks",
      "links": [
        [
          "sleep deprivation",
          "sleep deprivation"
        ]
      ],
      "raw_glosses": [
        "(informal) sleep deprivation"
      ],
      "tags": [
        "informal",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛp"
    }
  ],
  "word": "sleep dep"
}

{
  "head_templates": [
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      "args": {
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      "expansion": "sleep dep (uncountable)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "Rhymes:English/ɛp",
        "Rhymes:English/ɛp/2 syllables",
        "en:Sleep"
      ],
      "glosses": [
        "sleep deprivation"
      ],
      "links": [
        [
          "sleep deprivation",
          "sleep deprivation"
        ]
      ],
      "raw_glosses": [
        "(informal) sleep deprivation"
      ],
      "tags": [
        "informal",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ɛp"
    }
  ],
  "word": "sleep dep"
}