"knee-buckler" meaning in English

{
  "forms": [
    {
      "form": "knee-bucklers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "knee-buckler (plural knee-bucklers)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Baseball",
          "orig": "en:Baseball",
          "parents": [
            "Ball games",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
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            "Fundamental"
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          "source": "w"
        },
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          "_dis": "85 15",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w+disamb"
        }
      ],
      "glosses": [
        "A curveball (or occasionally a knuckleball) that fools the hitter, causing his or her knees to buckle (i.e. bend)."
      ],
      "id": "en-knee-buckler-en-noun-oP8NqjUM",
      "links": [
        [
          "baseball",
          "baseball"
        ],
        [
          "curveball",
          "curveball"
        ],
        [
          "knuckleball",
          "knuckleball"
        ]
      ],
      "raw_glosses": [
        "(baseball, slang) A curveball (or occasionally a knuckleball) that fools the hitter, causing his or her knees to buckle (i.e. bend)."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "ball-games",
        "baseball",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    },
    {
      "categories": [],
      "examples": [
        {
          "ref": "2008, Everett Stephenson Jr., Resolution, page 195",
          "text": "This guy is a sensitive and gentle, yet exciting sex partner, certainly not rough but always leading the dance. She could get weak, just anticipating him, a real knee buckler.",
          "type": "quotation"
        },
        {
          "ref": "2013, Erik Schubach, Music of the Soul, volume 1",
          "text": "“Hi, Jimmy!” His friends stared back and forth between him and myself with their mouths open. Bella smiled a patented knee buckler at him.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Anything so stunning as to have a weakening effect on a person."
      ],
      "id": "en-knee-buckler-en-noun-m7O2Rupv",
      "links": [
        [
          "stunning",
          "stunning"
        ]
      ],
      "raw_glosses": [
        "(slang) Anything so stunning as to have a weakening effect on a person."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-knee-buckler.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f1/En-au-knee-buckler.ogg/En-au-knee-buckler.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/f1/En-au-knee-buckler.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "knee-buckler"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "English terms with audio links"
  ],
  "forms": [
    {
      "form": "knee-bucklers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "knee-buckler (plural knee-bucklers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English slang",
        "en:Baseball"
      ],
      "glosses": [
        "A curveball (or occasionally a knuckleball) that fools the hitter, causing his or her knees to buckle (i.e. bend)."
      ],
      "links": [
        [
          "baseball",
          "baseball"
        ],
        [
          "curveball",
          "curveball"
        ],
        [
          "knuckleball",
          "knuckleball"
        ]
      ],
      "raw_glosses": [
        "(baseball, slang) A curveball (or occasionally a knuckleball) that fools the hitter, causing his or her knees to buckle (i.e. bend)."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "ball-games",
        "baseball",
        "games",
        "hobbies",
        "lifestyle",
        "sports"
      ]
    },
    {
      "categories": [
        "English slang",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2008, Everett Stephenson Jr., Resolution, page 195",
          "text": "This guy is a sensitive and gentle, yet exciting sex partner, certainly not rough but always leading the dance. She could get weak, just anticipating him, a real knee buckler.",
          "type": "quotation"
        },
        {
          "ref": "2013, Erik Schubach, Music of the Soul, volume 1",
          "text": "“Hi, Jimmy!” His friends stared back and forth between him and myself with their mouths open. Bella smiled a patented knee buckler at him.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Anything so stunning as to have a weakening effect on a person."
      ],
      "links": [
        [
          "stunning",
          "stunning"
        ]
      ],
      "raw_glosses": [
        "(slang) Anything so stunning as to have a weakening effect on a person."
      ],
      "tags": [
        "slang"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-knee-buckler.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/f1/En-au-knee-buckler.ogg/En-au-knee-buckler.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/f1/En-au-knee-buckler.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "knee-buckler"
}