"happy as Larry" meaning in English

{
  "etymology_text": "This has been said to refer to the Australian boxer Larry Foley (1849–1917), who never lost a fight. This is not likely as the earliest reference to the phrase is in a letter to the editor of the Illawarra Mercury in Wollongong, Australia in 1857. In it the correspondent \"G U A\" (probably Dr. George Underwood Alley, known for regularly corresponding with newspapers) writes \"...we'll all live together, like Brown's cows, and be as happy as Larry.\"",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective",
        "head": "(as) happy as Larry"
      },
      "expansion": "(as) happy as Larry",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English similes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Emotions",
          "orig": "en:Emotions",
          "parents": [
            "Mind",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Extremely happy and carefree."
      ],
      "id": "en-happy_as_Larry-en-adj-kLHLYwYr",
      "links": [
        [
          "happy",
          "happy"
        ],
        [
          "carefree",
          "carefree"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile, informal) Extremely happy and carefree."
      ],
      "synonyms": [
        {
          "word": "happy"
        }
      ],
      "tags": [
        "informal"
      ],
      "translations": [
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "extremely happy and carefree",
          "word": "feliz como una perdiz"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "sense": "extremely happy and carefree",
          "word": "más feliz que una perdiz"
        }
      ],
      "wikipedia": [
        "Larry Foley"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-happy as Larry.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/87/En-au-happy_as_Larry.ogg/En-au-happy_as_Larry.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/8/87/En-au-happy_as_Larry.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "happy as Larry"
}

{
  "etymology_text": "This has been said to refer to the Australian boxer Larry Foley (1849–1917), who never lost a fight. This is not likely as the earliest reference to the phrase is in a letter to the editor of the Illawarra Mercury in Wollongong, Australia in 1857. In it the correspondent \"G U A\" (probably Dr. George Underwood Alley, known for regularly corresponding with newspapers) writes \"...we'll all live together, like Brown's cows, and be as happy as Larry.\"",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective",
        "head": "(as) happy as Larry"
      },
      "expansion": "(as) happy as Larry",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English entries with topic categories using raw markup",
        "English eponyms",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English similes",
        "English terms with audio links",
        "English terms with non-redundant non-automated sortkeys",
        "en:Emotions"
      ],
      "glosses": [
        "Extremely happy and carefree."
      ],
      "links": [
        [
          "happy",
          "happy"
        ],
        [
          "carefree",
          "carefree"
        ]
      ],
      "qualifier": "simile",
      "raw_glosses": [
        "(simile, informal) Extremely happy and carefree."
      ],
      "tags": [
        "informal"
      ],
      "wikipedia": [
        "Larry Foley"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-happy as Larry.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/8/87/En-au-happy_as_Larry.ogg/En-au-happy_as_Larry.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/8/87/En-au-happy_as_Larry.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "synonyms": [
    {
      "word": "happy"
    }
  ],
  "translations": [
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "extremely happy and carefree",
      "word": "feliz como una perdiz"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "extremely happy and carefree",
      "word": "más feliz que una perdiz"
    }
  ],
  "word": "happy as Larry"
}