"yacker" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "yack",
        "3": "er",
        "id2": "agent noun"
      },
      "expansion": "yack + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "yack + -er",
  "forms": [
    {
      "form": "yackers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "yacker (plural yackers)",
      "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": "English terms suffixed with -er (agent noun)",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "pit-yacker"
        }
      ],
      "examples": [
        {
          "ref": "1961, Electronics world: Volume 65",
          "text": "Watch Those Lengthy Conversations: Stick to the 5-minute rule. How many times have you heard yackers say, \"Well, I guess we've used up our five\" when they've been talking for an hour.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "One who talks at length."
      ],
      "id": "en-yacker-en-noun-aGkQSMfz",
      "raw_glosses": [
        "(informal) One who talks at length."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "yacker"
}

{
  "derived": [
    {
      "word": "pit-yacker"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "yack",
        "3": "er",
        "id2": "agent noun"
      },
      "expansion": "yack + -er",
      "name": "suffix"
    }
  ],
  "etymology_text": "yack + -er",
  "forms": [
    {
      "form": "yackers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "yacker (plural yackers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English nouns",
        "English terms suffixed with -er (agent noun)",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1961, Electronics world: Volume 65",
          "text": "Watch Those Lengthy Conversations: Stick to the 5-minute rule. How many times have you heard yackers say, \"Well, I guess we've used up our five\" when they've been talking for an hour.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "One who talks at length."
      ],
      "raw_glosses": [
        "(informal) One who talks at length."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "word": "yacker"
}