"one for luck" meaning in English

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      "expansion": "one for luck",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1905, Charles Fletcher Lummis, Out West: A Magazine of the Old Pacific and the New:",
          "text": "\"Here's one for luck, anyway,\" said one of the others, and he lifted his pistol and fired into the brush. The troop laughed light-heartedly, and turned back toward town. But the shot for luck struck Lean John's horse, and it fell with a groan.",
          "type": "quote"
        },
        {
          "ref": "2013, Simon Hughes, Cricket's Greatest Rivalry:",
          "text": "As he reached the wicket, Yardley, the England captain, led three cheers (he forgot the 'and one for luck').",
          "type": "quote"
        }
      ],
      "glosses": [
        "An extra repetition of an action beyond what is needed."
      ],
      "id": "en-one_for_luck-en-noun-20KdMnXS",
      "links": [
        [
          "repetition",
          "repetition"
        ],
        [
          "action",
          "action"
        ]
      ],
      "synonyms": [
        {
          "word": "one more for luck"
        }
      ]
    }
  ],
  "word": "one for luck"
}

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      "expansion": "one for luck",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "examples": [
        {
          "ref": "1905, Charles Fletcher Lummis, Out West: A Magazine of the Old Pacific and the New:",
          "text": "\"Here's one for luck, anyway,\" said one of the others, and he lifted his pistol and fired into the brush. The troop laughed light-heartedly, and turned back toward town. But the shot for luck struck Lean John's horse, and it fell with a groan.",
          "type": "quote"
        },
        {
          "ref": "2013, Simon Hughes, Cricket's Greatest Rivalry:",
          "text": "As he reached the wicket, Yardley, the England captain, led three cheers (he forgot the 'and one for luck').",
          "type": "quote"
        }
      ],
      "glosses": [
        "An extra repetition of an action beyond what is needed."
      ],
      "links": [
        [
          "repetition",
          "repetition"
        ],
        [
          "action",
          "action"
        ]
      ]
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  ],
  "synonyms": [
    {
      "word": "one more for luck"
    }
  ],
  "word": "one for luck"
}