"knee-trembler" meaning in English

{
  "forms": [
    {
      "form": "knee-tremblers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "knee-trembler (plural knee-tremblers)",
      "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"
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          "source": "w"
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          "parents": [
            "Entries with topic categories using raw markup",
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Sex",
          "orig": "en:Sex",
          "parents": [
            "All topics",
            "Reproduction",
            "Fundamental",
            "Life",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A casual outdoor sexual encounter (commonly with a prostitute), usually in an alleyway or against a wall, with the man standing and the woman's knees raised."
      ],
      "id": "en-knee-trembler-en-noun-fQP3M52O",
      "raw_glosses": [
        "(slang) A casual outdoor sexual encounter (commonly with a prostitute), usually in an alleyway or against a wall, with the man standing and the woman's knees raised."
      ],
      "synonyms": [
        {
          "word": "knee-tremble"
        }
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-knee-trembler.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/b/b0/En-au-knee-trembler.ogg/En-au-knee-trembler.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/b/b0/En-au-knee-trembler.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "knee-trembler"
}

{
  "forms": [
    {
      "form": "knee-tremblers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "knee-trembler (plural knee-tremblers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with audio links",
        "English terms with non-redundant non-automated sortkeys",
        "en:Sex"
      ],
      "glosses": [
        "A casual outdoor sexual encounter (commonly with a prostitute), usually in an alleyway or against a wall, with the man standing and the woman's knees raised."
      ],
      "raw_glosses": [
        "(slang) A casual outdoor sexual encounter (commonly with a prostitute), usually in an alleyway or against a wall, with the man standing and the woman's knees raised."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-knee-trembler.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/b/b0/En-au-knee-trembler.ogg/En-au-knee-trembler.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/b/b0/En-au-knee-trembler.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "word": "knee-tremble"
    }
  ],
  "word": "knee-trembler"
}