"fuck knuckle" meaning in English

{
  "forms": [
    {
      "form": "fuck knuckles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fuck knuckle (plural fuck knuckles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "fuck-knuckle"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Commonwealth English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Irish English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1998 September 2, Randy Beaudreau, “This board is Beaudreau's House now”, in alt.tv.comedy-central (Usenet):",
          "text": "You fuck knuckles showed that you couldn't play fair, and because you couldn't play fair, now you've got to play by Beaudreau's Rules.",
          "type": "quote"
        },
        {
          "text": "2004 December 3, William J. Wolfe, “Re: PETA Campaign Pitches Fish As Smart”, aus.politics, alt.politics.british, alt.politics.communism, alt.politics.democrats, and alt.politics.economics, Usenet\nThat's right, fuck knuckle, you can't prove that fish feel pain, neither can anybody else."
        },
        {
          "text": "2006 May 25, Colin Kynoch, “aus.sport.aussie-rules”, Re: Bumblers Fined for cheating and runner booted for 2 weeks, Usenet\nAnd can you point to any Essendon supporter who has defended Dimma?\nDidn't think so you deluded fuck knuckle."
        },
        {
          "ref": "2006 June 30, Kerry Plowright, Vostock Station - Point of Impact, Trafford Publishing:",
          "text": "He still wondered who the fuck knuckle was who made them do that and who purchased the stupid fucking things.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of fuck-knuckle"
      ],
      "id": "en-fuck_knuckle-en-noun-bgbLio-8",
      "links": [
        [
          "humorous",
          "humorous"
        ],
        [
          "fuck-knuckle",
          "fuck-knuckle#English"
        ]
      ],
      "raw_glosses": [
        "(vulgar, slang, humorous, Commonwealth, UK, Ireland) Alternative form of fuck-knuckle"
      ],
      "tags": [
        "Commonwealth",
        "Ireland",
        "UK",
        "alt-of",
        "alternative",
        "humorous",
        "slang",
        "vulgar"
      ]
    }
  ],
  "word": "fuck knuckle"
}

{
  "forms": [
    {
      "form": "fuck knuckles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "fuck knuckle (plural fuck knuckles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "fuck-knuckle"
        }
      ],
      "categories": [
        "British English",
        "Commonwealth English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English humorous terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with quotations",
        "English vulgarities",
        "Irish English",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "ref": "1998 September 2, Randy Beaudreau, “This board is Beaudreau's House now”, in alt.tv.comedy-central (Usenet):",
          "text": "You fuck knuckles showed that you couldn't play fair, and because you couldn't play fair, now you've got to play by Beaudreau's Rules.",
          "type": "quote"
        },
        {
          "text": "2004 December 3, William J. Wolfe, “Re: PETA Campaign Pitches Fish As Smart”, aus.politics, alt.politics.british, alt.politics.communism, alt.politics.democrats, and alt.politics.economics, Usenet\nThat's right, fuck knuckle, you can't prove that fish feel pain, neither can anybody else."
        },
        {
          "text": "2006 May 25, Colin Kynoch, “aus.sport.aussie-rules”, Re: Bumblers Fined for cheating and runner booted for 2 weeks, Usenet\nAnd can you point to any Essendon supporter who has defended Dimma?\nDidn't think so you deluded fuck knuckle."
        },
        {
          "ref": "2006 June 30, Kerry Plowright, Vostock Station - Point of Impact, Trafford Publishing:",
          "text": "He still wondered who the fuck knuckle was who made them do that and who purchased the stupid fucking things.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Alternative form of fuck-knuckle"
      ],
      "links": [
        [
          "humorous",
          "humorous"
        ],
        [
          "fuck-knuckle",
          "fuck-knuckle#English"
        ]
      ],
      "raw_glosses": [
        "(vulgar, slang, humorous, Commonwealth, UK, Ireland) Alternative form of fuck-knuckle"
      ],
      "tags": [
        "Commonwealth",
        "Ireland",
        "UK",
        "alt-of",
        "alternative",
        "humorous",
        "slang",
        "vulgar"
      ]
    }
  ],
  "word": "fuck knuckle"
}