"chais pas" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "j'sais pas"
      },
      "expansion": "Contraction of j'sais pas",
      "name": "contr"
    }
  ],
  "etymology_text": "Contraction of j'sais pas.",
  "forms": [
    {
      "form": "chépa",
      "tags": [
        "alternative",
        "colloquial"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "chais pas",
      "name": "fr-phrase"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "dunno",
          "word": "je ne sais pas"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "alternative form of je ne sais pas: dunno"
      ],
      "id": "en-chais_pas-fr-phrase-S3PxiluD",
      "links": [
        [
          "je ne sais pas",
          "je ne sais pas#French"
        ],
        [
          "dunno",
          "dunno"
        ]
      ],
      "raw_glosses": [
        "(informal) alternative form of je ne sais pas: dunno"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʃɛ pa/"
    },
    {
      "ipa": "/ʃɛ pɑ/"
    }
  ],
  "word": "chais pas"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "j'sais pas"
      },
      "expansion": "Contraction of j'sais pas",
      "name": "contr"
    }
  ],
  "etymology_text": "Contraction of j'sais pas.",
  "forms": [
    {
      "form": "chépa",
      "tags": [
        "alternative",
        "colloquial"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "chais pas",
      "name": "fr-phrase"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "extra": "dunno",
          "word": "je ne sais pas"
        }
      ],
      "categories": [
        "French contractions",
        "French entries with incorrect language header",
        "French informal terms",
        "French lemmas",
        "French multiword terms",
        "French phrases",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "alternative form of je ne sais pas: dunno"
      ],
      "links": [
        [
          "je ne sais pas",
          "je ne sais pas#French"
        ],
        [
          "dunno",
          "dunno"
        ]
      ],
      "raw_glosses": [
        "(informal) alternative form of je ne sais pas: dunno"
      ],
      "tags": [
        "alt-of",
        "alternative",
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ʃɛ pa/"
    },
    {
      "ipa": "/ʃɛ pɑ/"
    }
  ],
  "word": "chais pas"
}