"knock oneself out" meaning in English

{
  "forms": [
    {
      "form": "knocks oneself out",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "knocking oneself out",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "knocked oneself out",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "knocked oneself out",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "knock oneself out (third-person singular simple present knocks oneself out, present participle knocking oneself out, simple past and past participle knocked oneself out)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "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 imperatives",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English phrasal verbs with particle (out)",
          "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"
        }
      ],
      "examples": [
        {
          "text": "\"These cookies are my favorite! Can I have some?\" \"Sure, knock yourself out.\" (i.e., have as many as you want)",
          "type": "example"
        },
        {
          "text": "(sarcastically, indicating lack of interest) \"I'm going to the store.\" / \"Knock yourself out.\"",
          "type": "example"
        }
      ],
      "glosses": [
        "To go ahead; to do as one pleases."
      ],
      "id": "en-knock_oneself_out-en-verb-vVZhK1UN",
      "links": [
        [
          "go ahead",
          "go ahead"
        ],
        [
          "please",
          "please"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, informal) To go ahead; to do as one pleases."
      ],
      "related": [
        {
          "word": "don't knock yourself out"
        },
        {
          "word": "help oneself"
        },
        {
          "word": "knock one out"
        },
        {
          "word": "knock out"
        },
        {
          "word": "suit yourself"
        }
      ],
      "tags": [
        "idiomatic",
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-knock oneself out.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/68/En-au-knock_oneself_out.ogg/En-au-knock_oneself_out.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/6/68/En-au-knock_oneself_out.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "knock oneself out"
}

{
  "forms": [
    {
      "form": "knocks oneself out",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "knocking oneself out",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "knocked oneself out",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "knocked oneself out",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "knock oneself out (third-person singular simple present knocks oneself out, present participle knocking oneself out, simple past and past participle knocked oneself out)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "don't knock yourself out"
    },
    {
      "word": "help oneself"
    },
    {
      "word": "knock one out"
    },
    {
      "word": "knock out"
    },
    {
      "word": "suit yourself"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English idioms",
        "English imperatives",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English phrasal verbs",
        "English phrasal verbs with particle (out)",
        "English terms with audio links",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with usage examples",
        "English verbs"
      ],
      "examples": [
        {
          "text": "\"These cookies are my favorite! Can I have some?\" \"Sure, knock yourself out.\" (i.e., have as many as you want)",
          "type": "example"
        },
        {
          "text": "(sarcastically, indicating lack of interest) \"I'm going to the store.\" / \"Knock yourself out.\"",
          "type": "example"
        }
      ],
      "glosses": [
        "To go ahead; to do as one pleases."
      ],
      "links": [
        [
          "go ahead",
          "go ahead"
        ],
        [
          "please",
          "please"
        ]
      ],
      "raw_glosses": [
        "(idiomatic, informal) To go ahead; to do as one pleases."
      ],
      "tags": [
        "idiomatic",
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-knock oneself out.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/6/68/En-au-knock_oneself_out.ogg/En-au-knock_oneself_out.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/6/68/En-au-knock_oneself_out.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "knock oneself out"
}