"as they say" meaning in English

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      "expansion": "as they say",
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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
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          "name": "English discourse markers",
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      "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": "they say"
        },
        {
          "word": "you know what they say"
        }
      ],
      "synonyms": [
        {
          "word": "as the saying goes"
        },
        {
          "word": ";"
        },
        {
          "word": "so they say[sentence adverb]] position>"
        }
      ],
      "translations": [
        {
          "code": "afb",
          "lang": "Arabic",
          "roman": "ʕala gōlathum",
          "sense": "Translations",
          "tags": [
            "Gulf-Arabic"
          ],
          "word": "على قولتهم"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "Translations",
          "word": "kuten sanotaan"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "Translations",
          "word": "comme on dit"
        },
        {
          "code": "de",
          "lang": "German",
          "sense": "Translations",
          "word": "wie man so schön sagt"
        },
        {
          "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"
}

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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "related": [
    {
      "word": "they say"
    },
    {
      "word": "you know what they say"
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      "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."
      ],
      "synonyms": [
        {
          "word": "as the saying goes"
        },
        {
          "word": ";"
        },
        {
          "word": "so they say[sentence adverb]] position>"
        }
      ]
    }
  ],
  "translations": [
    {
      "code": "afb",
      "lang": "Arabic",
      "roman": "ʕala gōlathum",
      "sense": "Translations",
      "tags": [
        "Gulf-Arabic"
      ],
      "word": "على قولتهم"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "Translations",
      "word": "kuten sanotaan"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "Translations",
      "word": "comme on dit"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "Translations",
      "word": "wie man so schön sagt"
    },
    {
      "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"
}