"squeaky bum time" meaning in English

{
  "etymology_text": "Attributed to Sir Alex Ferguson, famed Scottish association football manager and former player referencing the sound made by moving around in a plastic seat while squirming under pressure.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "squeaky bum time (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2003 March 18, “Fergie just can't stop playing his mind games”, in Daily Express, page 62",
          "text": "\"It's getting tickly now - squeaky-bum time, I call it.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Chiefly, an exciting part of a sporting event, particularly the final moments of a close game or season."
      ],
      "id": "en-squeaky_bum_time-en-noun-7~Oj6L2t",
      "raw_glosses": [
        "(informal, chiefly UK) Chiefly, an exciting part of a sporting event, particularly the final moments of a close game or season."
      ],
      "tags": [
        "UK",
        "informal",
        "uncountable"
      ],
      "wikipedia": [
        "association football"
      ]
    }
  ],
  "word": "squeaky bum time"
}

{
  "etymology_text": "Attributed to Sir Alex Ferguson, famed Scottish association football manager and former player referencing the sound made by moving around in a plastic seat while squirming under pressure.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "squeaky bum time (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "British English",
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "English uncountable nouns"
      ],
      "examples": [
        {
          "ref": "2003 March 18, “Fergie just can't stop playing his mind games”, in Daily Express, page 62",
          "text": "\"It's getting tickly now - squeaky-bum time, I call it.\"",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Chiefly, an exciting part of a sporting event, particularly the final moments of a close game or season."
      ],
      "raw_glosses": [
        "(informal, chiefly UK) Chiefly, an exciting part of a sporting event, particularly the final moments of a close game or season."
      ],
      "tags": [
        "UK",
        "informal",
        "uncountable"
      ],
      "wikipedia": [
        "association football"
      ]
    }
  ],
  "word": "squeaky bum time"
}