"gym knickers" meaning in English

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      "expansion": "gym knickers pl (plural only)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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          "name": "Clothing",
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          "kind": "topical",
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          "name": "Underwear",
          "orig": "en:Underwear",
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            "Clothing",
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            "Fundamental"
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      "examples": [
        {
          "ref": "1989, Roald Dahl, Matilda",
          "text": "\"But instead of going there, I sneaked into the Trunchbull's room. And after a speedy search I found the drawer where she kept all her gym knickers.\"",
          "type": "quotation"
        },
        {
          "ref": "1993 October 11, Angela Lambert, The Independent",
          "text": "I never knew why they singled me out, though at the time I believed it was because my mother made me wear green gym knickers and everyone else's were navy or white.",
          "type": "quotation"
        },
        {
          "ref": "2010 December 5, Gail Emms, The Guardian",
          "text": "I remember being forced to do cross-country runs in horrible navy gym knickers, which is a nightmare when you're not exactly built like Paula Radcliffe [...].",
          "type": "quotation"
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      "glosses": [
        "Large girls' underpants traditionally worn as shorts during school sports activities."
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      "id": "en-gym_knickers-en-noun-FuTIt9J7",
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          "underpants",
          "underpants"
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          "school",
          "school"
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      "raw_glosses": [
        "(UK) Large girls' underpants traditionally worn as shorts during school sports activities."
      ],
      "tags": [
        "UK",
        "plural",
        "plural-only"
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  "word": "gym knickers"
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  "lang_code": "en",
  "pos": "noun",
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        "en:Clothing",
        "en:Underwear"
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        {
          "ref": "1989, Roald Dahl, Matilda",
          "text": "\"But instead of going there, I sneaked into the Trunchbull's room. And after a speedy search I found the drawer where she kept all her gym knickers.\"",
          "type": "quotation"
        },
        {
          "ref": "1993 October 11, Angela Lambert, The Independent",
          "text": "I never knew why they singled me out, though at the time I believed it was because my mother made me wear green gym knickers and everyone else's were navy or white.",
          "type": "quotation"
        },
        {
          "ref": "2010 December 5, Gail Emms, The Guardian",
          "text": "I remember being forced to do cross-country runs in horrible navy gym knickers, which is a nightmare when you're not exactly built like Paula Radcliffe [...].",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Large girls' underpants traditionally worn as shorts during school sports activities."
      ],
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        "(UK) Large girls' underpants traditionally worn as shorts during school sports activities."
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  "word": "gym knickers"
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