"shake a leg" meaning in English

{
  "forms": [
    {
      "form": "shakes a leg",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "shaking a leg",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "shook a leg",
      "tags": [
        "past"
      ]
    },
    {
      "form": "shaken a leg",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "shake<,,shook,shaken> a leg"
      },
      "expansion": "shake a leg (third-person singular simple present shakes a leg, present participle shaking a leg, simple past shook a leg, past participle shaken a leg)",
      "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 predicates",
          "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": "Shake a leg! We haven't got all day.",
          "type": "example"
        }
      ],
      "glosses": [
        "To get busy; to get going; to be productive."
      ],
      "id": "en-shake_a_leg-en-verb-0D~SSx~6",
      "links": [
        [
          "get busy",
          "get busy"
        ],
        [
          "get going",
          "get going"
        ],
        [
          "productive",
          "productive"
        ]
      ],
      "qualifier": "frequently imperative",
      "raw_glosses": [
        "(idiomatic, frequently imperative) To get busy; to get going; to be productive."
      ],
      "related": [
        {
          "word": "break a leg"
        },
        {
          "word": "show a leg"
        }
      ],
      "tags": [
        "idiomatic"
      ],
      "translations": [
        {
          "code": "cs",
          "lang": "Czech",
          "sense": "get busy; get going; be productive",
          "word": "pohnout kostrou"
        },
        {
          "code": "fr",
          "lang": "French",
          "sense": "get busy; get going; be productive",
          "word": "se secouer"
        },
        {
          "code": "ru",
          "lang": "Russian",
          "roman": "ševelisʹ",
          "sense": "get busy; get going; be productive",
          "word": "шевелись"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-shake a leg.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/a/a5/En-au-shake_a_leg.ogg/En-au-shake_a_leg.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/a/a5/En-au-shake_a_leg.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "shake a leg"
}

{
  "forms": [
    {
      "form": "shakes a leg",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "shaking a leg",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "shook a leg",
      "tags": [
        "past"
      ]
    },
    {
      "form": "shaken a leg",
      "tags": [
        "participle",
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "shake<,,shook,shaken> a leg"
      },
      "expansion": "shake a leg (third-person singular simple present shakes a leg, present participle shaking a leg, simple past shook a leg, past participle shaken a leg)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "break a leg"
    },
    {
      "word": "show a leg"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English predicates",
        "English terms with audio links",
        "English terms with non-redundant non-automated sortkeys",
        "English terms with usage examples",
        "English verbs"
      ],
      "examples": [
        {
          "text": "Shake a leg! We haven't got all day.",
          "type": "example"
        }
      ],
      "glosses": [
        "To get busy; to get going; to be productive."
      ],
      "links": [
        [
          "get busy",
          "get busy"
        ],
        [
          "get going",
          "get going"
        ],
        [
          "productive",
          "productive"
        ]
      ],
      "qualifier": "frequently imperative",
      "raw_glosses": [
        "(idiomatic, frequently imperative) To get busy; to get going; to be productive."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-shake a leg.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/a/a5/En-au-shake_a_leg.ogg/En-au-shake_a_leg.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/a/a5/En-au-shake_a_leg.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "translations": [
    {
      "code": "cs",
      "lang": "Czech",
      "sense": "get busy; get going; be productive",
      "word": "pohnout kostrou"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "get busy; get going; be productive",
      "word": "se secouer"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "roman": "ševelisʹ",
      "sense": "get busy; get going; be productive",
      "word": "шевелись"
    }
  ],
  "word": "shake a leg"
}