"MFW" meaning in English

{
  "etymology_text": "Originated on 4chan.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "MFW",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "senses": [
    {
      "alt_of": [
        {
          "word": "my face when"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Internet memes",
          "orig": "en:Internet memes",
          "parents": [
            "Comedy",
            "Internet",
            "Memetics",
            "Drama",
            "Computing",
            "Networking",
            "Philosophy",
            "Theater",
            "Technology",
            "All topics",
            "Art",
            "Entertainment",
            "Fundamental",
            "Culture",
            "Society"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of my face when ...."
      ],
      "id": "en-MFW-en-phrase-JEEDJ5Mz",
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "my",
          "my#English"
        ],
        [
          "face",
          "face#English"
        ],
        [
          "when",
          "when#English"
        ]
      ],
      "raw_glosses": [
        "(Internet slang) Initialism of my face when ...."
      ],
      "related": [
        {
          "word": "MRW"
        }
      ],
      "tags": [
        "Internet",
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "MFW"
}

{
  "etymology_text": "Originated on 4chan.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "phrase"
      },
      "expansion": "MFW",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "phrase",
  "related": [
    {
      "word": "MRW"
    }
  ],
  "senses": [
    {
      "alt_of": [
        {
          "word": "my face when"
        }
      ],
      "categories": [
        "English 4chan slang",
        "English entries with incorrect language header",
        "English initialisms",
        "English internet slang",
        "English lemmas",
        "English phrases",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Internet memes"
      ],
      "glosses": [
        "Initialism of my face when ...."
      ],
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "my",
          "my#English"
        ],
        [
          "face",
          "face#English"
        ],
        [
          "when",
          "when#English"
        ]
      ],
      "raw_glosses": [
        "(Internet slang) Initialism of my face when ...."
      ],
      "tags": [
        "Internet",
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "MFW"
}