"beef up" meaning in English

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  "etymology_text": "Originally college slang, from beef (“muscle-power”).",
  "forms": [
    {
      "form": "beefs up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "beefing up",
      "tags": [
        "participle",
        "present"
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    },
    {
      "form": "beefed up",
      "tags": [
        "participle",
        "past"
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    },
    {
      "form": "beefed up",
      "tags": [
        "past"
      ]
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      "expansion": "beef up (third-person singular simple present beefs up, present participle beefing up, simple past and past participle beefed up)",
      "name": "en-verb"
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  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
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          "name": "English phrasal verbs with particle (up)",
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      "examples": [
        {
          "text": "We need to beef up security around the airport.",
          "type": "example"
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      ],
      "glosses": [
        "To strengthen or reinforce; to add substance to."
      ],
      "id": "en-beef_up-en-verb-8W6SegGz",
      "links": [
        [
          "strengthen",
          "strengthen"
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          "reinforce",
          "reinforce"
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      "raw_glosses": [
        "(slang, transitive) To strengthen or reinforce; to add substance to."
      ],
      "related": [
        {
          "word": "beef"
        },
        {
          "word": "beefed out"
        },
        {
          "word": "beefed up"
        },
        {
          "word": "beef out"
        },
        {
          "word": "beefy"
        }
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      "ogg_url": "https://upload.wikimedia.org/wikipedia/commons/d/df/En-au-beef_up.ogg",
      "tags": [
        "Australia"
      ],
      "text": "Audio (AU)"
    }
  ],
  "word": "beef up"
}

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        "2": "beef",
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        "4": "muscle-power"
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    }
  ],
  "etymology_text": "Originally college slang, from beef (“muscle-power”).",
  "forms": [
    {
      "form": "beefs up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "beefing up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "beefed up",
      "tags": [
        "participle",
        "past"
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    {
      "form": "beefed up",
      "tags": [
        "past"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "related": [
    {
      "word": "beef"
    },
    {
      "word": "beefed out"
    },
    {
      "word": "beefed up"
    },
    {
      "word": "beef out"
    },
    {
      "word": "beefy"
    }
  ],
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      "examples": [
        {
          "text": "We need to beef up security around the airport.",
          "type": "example"
        }
      ],
      "glosses": [
        "To strengthen or reinforce; to add substance to."
      ],
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        [
          "strengthen",
          "strengthen"
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          "reinforce",
          "reinforce"
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        "(slang, transitive) To strengthen or reinforce; to add substance to."
      ],
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  "word": "beef up"
}