"as they say" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "as they say",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English discourse markers",
          "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": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English subordinate clauses",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A vague invocation of popular convention when introducing a phrase or expression, which may be accompanied by attribution to a source or locale in which the phrase or expression is used."
      ],
      "id": "en-as_they_say-en-phrase-41FlSzoo",
      "related": [
        {
          "word": "you know what they say"
        },
        {
          "word": "as the saying goes"
        }
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "kuten sanotaan"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "comme on dit"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "word": "jak to mówią"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "kak govorítsja",
          "sense": "Translations",
          "word": "как говори́тся"
        }
      ]
    }
  ],
  "word": "as they say"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "as they say",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "related": [
    {
      "word": "you know what they say"
    },
    {
      "word": "as the saying goes"
    }
  ],
  "senses": [
    {
      "categories": [
        "English discourse markers",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English phrases",
        "English subordinate clauses",
        "English terms with non-redundant non-automated sortkeys",
        "Translation table header lacks gloss"
      ],
      "glosses": [
        "A vague invocation of popular convention when introducing a phrase or expression, which may be accompanied by attribution to a source or locale in which the phrase or expression is used."
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "kuten sanotaan"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "comme on dit"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "word": "jak to mówią"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "kak govorítsja",
      "sense": "Translations",
      "word": "как говори́тся"
    }
  ],
  "word": "as they say"
}