"slip someone's mind" meaning in English

{
  "forms": [
    {
      "form": "slips someone's mind",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "slipping someone's mind",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "slipped someone's mind",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "slipped someone's mind",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "slip someone's mind (third-person singular simple present slips someone's mind, present participle slipping someone's mind, simple past and past participle slipped someone's mind)",
      "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": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Polish translations",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "I meant to call her today, but it completely slipped my mind.",
          "type": "example"
        }
      ],
      "glosses": [
        "To be forgotten by someone; to escape someone's memory."
      ],
      "id": "en-slip_someone's_mind-en-verb-9J-CoBvu",
      "links": [
        [
          "forgotten",
          "forgotten"
        ],
        [
          "escape",
          "escape"
        ],
        [
          "memory",
          "memory"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To be forgotten by someone; to escape someone's memory."
      ],
      "tags": [
        "idiomatic"
      ],
      "translations": [
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "tags": [
            "imperfective"
          ],
          "word": "wypadać z głowy"
        },
        {
          "code": "pl",
          "lang": "Polish",
          "sense": "Translations",
          "tags": [
            "perfective"
          ],
          "word": "wypaść z głowy"
        }
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-slip someone's mind.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/3/3a/En-au-slip_someone%27s_mind.ogg/En-au-slip_someone%27s_mind.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/3/3a/En-au-slip_someone%27s_mind.ogg"
    }
  ],
  "word": "slip someone's mind"
}

{
  "forms": [
    {
      "form": "slips someone's mind",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "slipping someone's mind",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "slipped someone's mind",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "slipped someone's mind",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "slip someone's mind (third-person singular simple present slips someone's mind, present participle slipping someone's mind, simple past and past participle slipped someone's mind)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English idioms",
        "English lemmas",
        "English multiword terms",
        "English terms with usage examples",
        "English verbs",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Polish translations",
        "Translation table header lacks gloss"
      ],
      "examples": [
        {
          "text": "I meant to call her today, but it completely slipped my mind.",
          "type": "example"
        }
      ],
      "glosses": [
        "To be forgotten by someone; to escape someone's memory."
      ],
      "links": [
        [
          "forgotten",
          "forgotten"
        ],
        [
          "escape",
          "escape"
        ],
        [
          "memory",
          "memory"
        ]
      ],
      "raw_glosses": [
        "(idiomatic) To be forgotten by someone; to escape someone's memory."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "sounds": [
    {
      "audio": "En-au-slip someone's mind.ogg",
      "mp3_url": "https://upload.wikimedia.org/wikipedia/commons/transcoded/3/3a/En-au-slip_someone%27s_mind.ogg/En-au-slip_someone%27s_mind.ogg.mp3",
      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/3/3a/En-au-slip_someone%27s_mind.ogg"
    }
  ],
  "translations": [
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "tags": [
        "imperfective"
      ],
      "word": "wypadać z głowy"
    },
    {
      "code": "pl",
      "lang": "Polish",
      "sense": "Translations",
      "tags": [
        "perfective"
      ],
      "word": "wypaść z głowy"
    }
  ],
  "word": "slip someone's mind"
}