"have at" meaning in English

{
  "forms": [
    {
      "form": "has at",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "having at",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "had at",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "had at",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "have<has,,had> at"
      },
      "expansion": "have at (third-person singular simple present has at, present participle having at, simple past and past participle had at)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "ref": "1909, Anatole France (Alfred Allinson, translator), The Well of Saint Clare, ch. 10",
          "text": "The Prince of Venosa was in their midst, shouting: \"Have at the traitor! Kill! Kill!\""
        }
      ],
      "glosses": [
        "To attack; to engage in combat with."
      ],
      "id": "en-have_at-en-verb-pj-yq-OY",
      "links": [
        [
          "attack",
          "attack"
        ],
        [
          "combat",
          "combat"
        ]
      ],
      "raw_glosses": [
        "(transitive, idiomatic, archaic) To attack; to engage in combat with."
      ],
      "tags": [
        "archaic",
        "idiomatic",
        "transitive"
      ]
    },
    {
      "categories": [
        {
          "_dis": "10 6 84",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "19 9 72",
          "kind": "other",
          "name": "English phrasal verbs formed with \"at\"",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "14 6 80",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "13 5 82",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "22 31 47",
          "kind": "topical",
          "langcode": "en",
          "name": "Violence",
          "orig": "en:Violence",
          "parents": [
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "text": "A huge dish of food was served, and we had at it.",
          "type": "example"
        }
      ],
      "glosses": [
        "To take on; to begin dealing with."
      ],
      "id": "en-have_at-en-verb-RayczUpu",
      "links": [
        [
          "take on",
          "take on"
        ]
      ],
      "raw_glosses": [
        "(transitive, figurative) To take on; to begin dealing with."
      ],
      "tags": [
        "figuratively",
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-have at.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/fa/En-au-have_at.ogg/En-au-have_at.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/fa/En-au-have_at.ogg"
    }
  ],
  "word": "have at"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "have at",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [],
      "glosses": [
        "Go ahead."
      ],
      "id": "en-have_at-en-intj-VoJPa0nq",
      "links": [
        [
          "Go ahead",
          "go ahead#English"
        ]
      ],
      "raw_glosses": [
        "(informal) Go ahead."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-have at.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/fa/En-au-have_at.ogg/En-au-have_at.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/fa/En-au-have_at.ogg"
    }
  ],
  "word": "have at"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English interjections",
    "English lemmas",
    "English multiword terms",
    "English phrasal verbs",
    "English phrasal verbs formed with \"at\"",
    "English verbs",
    "Pages with 1 entry",
    "Pages with entries",
    "en:Violence"
  ],
  "forms": [
    {
      "form": "has at",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "having at",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "had at",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "had at",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "have<has,,had> at"
      },
      "expansion": "have at (third-person singular simple present has at, present participle having at, simple past and past participle had at)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English idioms",
        "English terms with archaic senses",
        "English transitive verbs"
      ],
      "examples": [
        {
          "ref": "1909, Anatole France (Alfred Allinson, translator), The Well of Saint Clare, ch. 10",
          "text": "The Prince of Venosa was in their midst, shouting: \"Have at the traitor! Kill! Kill!\""
        }
      ],
      "glosses": [
        "To attack; to engage in combat with."
      ],
      "links": [
        [
          "attack",
          "attack"
        ],
        [
          "combat",
          "combat"
        ]
      ],
      "raw_glosses": [
        "(transitive, idiomatic, archaic) To attack; to engage in combat with."
      ],
      "tags": [
        "archaic",
        "idiomatic",
        "transitive"
      ]
    },
    {
      "categories": [
        "English terms with usage examples",
        "English transitive verbs"
      ],
      "examples": [
        {
          "text": "A huge dish of food was served, and we had at it.",
          "type": "example"
        }
      ],
      "glosses": [
        "To take on; to begin dealing with."
      ],
      "links": [
        [
          "take on",
          "take on"
        ]
      ],
      "raw_glosses": [
        "(transitive, figurative) To take on; to begin dealing with."
      ],
      "tags": [
        "figuratively",
        "transitive"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-have at.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/fa/En-au-have_at.ogg/En-au-have_at.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/fa/En-au-have_at.ogg"
    }
  ],
  "word": "have at"
}

{
  "categories": [
    "English entries with incorrect language header",
    "English interjections",
    "English lemmas",
    "English multiword terms",
    "English phrasal verbs",
    "English phrasal verbs formed with \"at\"",
    "English verbs",
    "Pages with 1 entry",
    "Pages with entries",
    "en:Violence"
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "have at",
      "name": "en-interj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "intj",
  "senses": [
    {
      "categories": [
        "English informal terms"
      ],
      "glosses": [
        "Go ahead."
      ],
      "links": [
        [
          "Go ahead",
          "go ahead#English"
        ]
      ],
      "raw_glosses": [
        "(informal) Go ahead."
      ],
      "tags": [
        "informal"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "en-au-have at.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/f/fa/En-au-have_at.ogg/En-au-have_at.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/f/fa/En-au-have_at.ogg"
    }
  ],
  "word": "have at"
}