"you know it" meaning in English

{
  "head_templates": [
    {
      "args": {},
      "expansion": "you know it",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
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          "kind": "other",
          "name": "English entries with incorrect language header",
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      ],
      "examples": [
        {
          "text": "\"What he did to her was wrong.\" \"You know it, sister!\""
        },
        {
          "ref": "2004, Tom Perrotta, Little Children, page 301",
          "text": "\"I've still got a few years on the chain gang.\" \"Counting the days, huh?\" \"You know it.\"",
          "type": "quotation"
        },
        {
          "ref": "2006, Dorothea Benton Frank, Full of Grace, page 19",
          "text": "He's a little bit older, mind you, but good people, if you know what I'm saying to you …\" \"Italian, right?\" \"You know it, baby, and —\" \"Over fifty? Widowed? Grown children?\" \"You're a mind reader!\"",
          "type": "quotation"
        },
        {
          "ref": "2007, Sheila M. Goss, Roses Are Thorns, Violets Are True, page 96",
          "text": "\"Man, I wonder if David found out. Is that why they divorced?\" \"You know it.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Indicates agreement, approval, encouragement."
      ],
      "id": "en-you_know_it-en-intj-EW0rs2eF",
      "raw_glosses": [
        "(idiomatic) Indicates agreement, approval, encouragement."
      ],
      "related": [
        {
          "word": "you knows it"
        }
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-you know it.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/d/d0/En-au-you_know_it.ogg/En-au-you_know_it.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/d/d0/En-au-you_know_it.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "you know it"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "you know it",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "related": [
    {
      "word": "you knows it"
    }
  ],
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        "English entries with language name categories using raw markup",
        "English idioms",
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        "English terms with non-redundant non-automated sortkeys",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "text": "\"What he did to her was wrong.\" \"You know it, sister!\""
        },
        {
          "ref": "2004, Tom Perrotta, Little Children, page 301",
          "text": "\"I've still got a few years on the chain gang.\" \"Counting the days, huh?\" \"You know it.\"",
          "type": "quotation"
        },
        {
          "ref": "2006, Dorothea Benton Frank, Full of Grace, page 19",
          "text": "He's a little bit older, mind you, but good people, if you know what I'm saying to you …\" \"Italian, right?\" \"You know it, baby, and —\" \"Over fifty? Widowed? Grown children?\" \"You're a mind reader!\"",
          "type": "quotation"
        },
        {
          "ref": "2007, Sheila M. Goss, Roses Are Thorns, Violets Are True, page 96",
          "text": "\"Man, I wonder if David found out. Is that why they divorced?\" \"You know it.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Indicates agreement, approval, encouragement."
      ],
      "raw_glosses": [
        "(idiomatic) Indicates agreement, approval, encouragement."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-you know it.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/d/d0/En-au-you_know_it.ogg/En-au-you_know_it.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/d/d0/En-au-you_know_it.ogg",
      "tags": [
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  "word": "you know it"
}