"you must be new here" meaning in English

{
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      "expansion": "you must be new here",
      "name": "head"
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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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      "examples": [
        {
          "ref": "1986, Anthony Robbins, Unlimited Power: The New Science of Personal Achievement, Free Press, published 2003, page 384",
          "text": "What would happen if you went to the soil and said, \"Give me some fruit. Give me some plants\"? The soil would probably respond, \"Excuse me, sir, but you're a little confused. You must be new here. That's not the way the game is played.\"",
          "type": "quotation"
        },
        {
          "ref": "2009 November 9, Annie Barrett, “'Dancing With the Stars' recap: Period Pieces”, in Entertainment Weekly",
          "text": "Did you really think I wouldn't discuss the most important segment of the season before beginning with the rankings? You must be new here.",
          "type": "quotation"
        },
        {
          "ref": "2010 May 29, John Jeansonne, “Questions remain for U.S. on eve of World Cup”, in Newsday",
          "text": "When a Turkish reporter, after yesterday's 2-1 U.S. Cup tune-up victory over Turkey, asked U.S. coach Bob Bradley to name his starting lineup for its tournament opener against England on June 12, a team publicist slyly remarked to the reporter: \"You must be new here.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Used to express (often sarcastically) that someone has in some way displayed their ignorance, unfamiliarity, or incompetence."
      ],
      "id": "en-you_must_be_new_here-en-phrase-IPDFb5AS",
      "links": [
        [
          "express",
          "express#English"
        ],
        [
          "sarcastically",
          "sarcastically#English"
        ],
        [
          "ignorance",
          "ignorance#English"
        ],
        [
          "unfamiliarity",
          "unfamiliarity#English"
        ],
        [
          "incompetence",
          "incompetence#English"
        ]
      ]
    }
  ],
  "word": "you must be new here"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
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  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
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      "examples": [
        {
          "ref": "1986, Anthony Robbins, Unlimited Power: The New Science of Personal Achievement, Free Press, published 2003, page 384",
          "text": "What would happen if you went to the soil and said, \"Give me some fruit. Give me some plants\"? The soil would probably respond, \"Excuse me, sir, but you're a little confused. You must be new here. That's not the way the game is played.\"",
          "type": "quotation"
        },
        {
          "ref": "2009 November 9, Annie Barrett, “'Dancing With the Stars' recap: Period Pieces”, in Entertainment Weekly",
          "text": "Did you really think I wouldn't discuss the most important segment of the season before beginning with the rankings? You must be new here.",
          "type": "quotation"
        },
        {
          "ref": "2010 May 29, John Jeansonne, “Questions remain for U.S. on eve of World Cup”, in Newsday",
          "text": "When a Turkish reporter, after yesterday's 2-1 U.S. Cup tune-up victory over Turkey, asked U.S. coach Bob Bradley to name his starting lineup for its tournament opener against England on June 12, a team publicist slyly remarked to the reporter: \"You must be new here.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Used to express (often sarcastically) that someone has in some way displayed their ignorance, unfamiliarity, or incompetence."
      ],
      "links": [
        [
          "express",
          "express#English"
        ],
        [
          "sarcastically",
          "sarcastically#English"
        ],
        [
          "ignorance",
          "ignorance#English"
        ],
        [
          "unfamiliarity",
          "unfamiliarity#English"
        ],
        [
          "incompetence",
          "incompetence#English"
        ]
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  ],
  "word": "you must be new here"
}