"says you" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "says you",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "Hot dogs are the best food ever! — Says you!"
        },
        {
          "text": "My car is the fastest car in this whole parking lot! — Says you. Prove it, let's race."
        }
      ],
      "glosses": [
        "a statement of disagreement or disbelief, especially when highlighting hypocrisy"
      ],
      "id": "en-says_you-en-phrase-6T0PBRu2"
    }
  ],
  "word": "says you"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "says you",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English phrases"
      ],
      "examples": [
        {
          "text": "Hot dogs are the best food ever! — Says you!"
        },
        {
          "text": "My car is the fastest car in this whole parking lot! — Says you. Prove it, let's race."
        }
      ],
      "glosses": [
        "a statement of disagreement or disbelief, especially when highlighting hypocrisy"
      ]
    }
  ],
  "word": "says you"
}