"rusty trombone" meaning in English

{
  "etymology_text": "In reference to the hand-mouth coordination and motions required while playing the trombone, and the rust-color of fecal matter.",
  "forms": [
    {
      "form": "rusty trombones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "rusty trombone (plural rusty trombones)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Sex positions",
          "orig": "en:Sex positions",
          "parents": [
            "Sex",
            "All topics",
            "Reproduction",
            "Fundamental",
            "Life",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2003, United States. Federal Communications Commission, FCC record, volume 18, number 10:",
          "text": "The “RustyTrombone\" you know that I think that is the oldest of all these sickening things uh, 'cause I heard that one years and years and years ago.",
          "type": "quote"
        },
        {
          "ref": "2008, Don Haynes, Lee Gerst, D.N.R.-The Best Show That Will Never Be on Television, page 106:",
          "text": "What I did to your mom last night. I think is called a rusty trombone or maybe it's a cherry cheese danish.",
          "type": "quote"
        },
        {
          "ref": "2010, Justin Heimberg, David Gomberg, The Big Book: Over 1,500 Absolutely Absurd Dilemmas to Ponder, page 134:",
          "text": "Would you rather live in a world where[…] regardless of where you went to sleep, every morning you always wake up naked and spooning a complete stranger OR once a month a siren randomly goes off and you are required to give a “rusty trombone” to the person standing nearest to you?",
          "type": "quote"
        }
      ],
      "glosses": [
        "The act of simultaneously performing anilingus and masturbating the penis."
      ],
      "id": "en-rusty_trombone-en-noun-bjlsFjos",
      "links": [
        [
          "anilingus",
          "anilingus"
        ],
        [
          "masturbating",
          "masturbate"
        ]
      ],
      "raw_glosses": [
        "(slang, vulgar) The act of simultaneously performing anilingus and masturbating the penis."
      ],
      "tags": [
        "slang",
        "vulgar"
      ],
      "wikipedia": [
        "rusty trombone"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-rusty trombone.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/91/En-au-rusty_trombone.ogg/En-au-rusty_trombone.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/9/91/En-au-rusty_trombone.ogg"
    }
  ],
  "word": "rusty trombone"
}

{
  "etymology_text": "In reference to the hand-mouth coordination and motions required while playing the trombone, and the rust-color of fecal matter.",
  "forms": [
    {
      "form": "rusty trombones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "rusty trombone (plural rusty trombones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English slang",
        "English terms with quotations",
        "English vulgarities",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Sex positions"
      ],
      "examples": [
        {
          "ref": "2003, United States. Federal Communications Commission, FCC record, volume 18, number 10:",
          "text": "The “RustyTrombone\" you know that I think that is the oldest of all these sickening things uh, 'cause I heard that one years and years and years ago.",
          "type": "quote"
        },
        {
          "ref": "2008, Don Haynes, Lee Gerst, D.N.R.-The Best Show That Will Never Be on Television, page 106:",
          "text": "What I did to your mom last night. I think is called a rusty trombone or maybe it's a cherry cheese danish.",
          "type": "quote"
        },
        {
          "ref": "2010, Justin Heimberg, David Gomberg, The Big Book: Over 1,500 Absolutely Absurd Dilemmas to Ponder, page 134:",
          "text": "Would you rather live in a world where[…] regardless of where you went to sleep, every morning you always wake up naked and spooning a complete stranger OR once a month a siren randomly goes off and you are required to give a “rusty trombone” to the person standing nearest to you?",
          "type": "quote"
        }
      ],
      "glosses": [
        "The act of simultaneously performing anilingus and masturbating the penis."
      ],
      "links": [
        [
          "anilingus",
          "anilingus"
        ],
        [
          "masturbating",
          "masturbate"
        ]
      ],
      "raw_glosses": [
        "(slang, vulgar) The act of simultaneously performing anilingus and masturbating the penis."
      ],
      "tags": [
        "slang",
        "vulgar"
      ],
      "wikipedia": [
        "rusty trombone"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-rusty trombone.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/9/91/En-au-rusty_trombone.ogg/En-au-rusty_trombone.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/9/91/En-au-rusty_trombone.ogg"
    }
  ],
  "word": "rusty trombone"
}