"off the deep end" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective",
        "head": "off the deep end"
      },
      "expansion": "off the deep end",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "text": "I told him that I'd broken the vase, and he went off the deep end.",
          "type": "example"
        }
      ],
      "glosses": [
        "Extremely angry."
      ],
      "id": "en-off_the_deep_end-en-adj-KRF3zDb4",
      "links": [
        [
          "angry",
          "angry"
        ]
      ],
      "qualifier": "usually in the phrase 'go off the deep end'",
      "raw_glosses": [
        "(usually in the phrase 'go off the deep end') Extremely angry."
      ]
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "_dis": "2 98",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "0 100",
          "kind": "topical",
          "langcode": "en",
          "name": "Anger",
          "orig": "en:Anger",
          "parents": [
            "Emotions",
            "Mind",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "It used to be a funny comic, but lately it has gone off the deep end.",
          "type": "example"
        }
      ],
      "glosses": [
        "Crazy, erratic, or irrational."
      ],
      "id": "en-off_the_deep_end-en-adj-Vhz54uFw",
      "links": [
        [
          "Crazy",
          "crazy"
        ],
        [
          "erratic",
          "erratic"
        ],
        [
          "irrational",
          "irrational"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, US) Crazy, erratic, or irrational."
      ],
      "related": [
        {
          "_dis1": "0 100",
          "word": "off the wall"
        }
      ],
      "synonyms": [
        {
          "word": "insane"
        }
      ],
      "tags": [
        "US",
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-off the deep end.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/e3/En-au-off_the_deep_end.ogg/En-au-off_the_deep_end.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/e/e3/En-au-off_the_deep_end.ogg"
    }
  ],
  "word": "off the deep end"
}

{
  "categories": [
    "English adjectives",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "Pages with 1 entry",
    "Pages with entries",
    "en:Anger"
  ],
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective",
        "head": "off the deep end"
      },
      "expansion": "off the deep end",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "off the wall"
    }
  ],
  "senses": [
    {
      "categories": [
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "I told him that I'd broken the vase, and he went off the deep end.",
          "type": "example"
        }
      ],
      "glosses": [
        "Extremely angry."
      ],
      "links": [
        [
          "angry",
          "angry"
        ]
      ],
      "qualifier": "usually in the phrase 'go off the deep end'",
      "raw_glosses": [
        "(usually in the phrase 'go off the deep end') Extremely angry."
      ]
    },
    {
      "categories": [
        "American English",
        "English idioms",
        "English terms with usage examples"
      ],
      "examples": [
        {
          "text": "It used to be a funny comic, but lately it has gone off the deep end.",
          "type": "example"
        }
      ],
      "glosses": [
        "Crazy, erratic, or irrational."
      ],
      "links": [
        [
          "Crazy",
          "crazy"
        ],
        [
          "erratic",
          "erratic"
        ],
        [
          "irrational",
          "irrational"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, US) Crazy, erratic, or irrational."
      ],
      "synonyms": [
        {
          "word": "insane"
        }
      ],
      "tags": [
        "US",
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-off the deep end.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/e/e3/En-au-off_the_deep_end.ogg/En-au-off_the_deep_end.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/e/e3/En-au-off_the_deep_end.ogg"
    }
  ],
  "word": "off the deep end"
}