"merc up" meaning in English

{
  "forms": [
    {
      "form": "mercs up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "mercing up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "merced up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "merced up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "merc up (third-person singular simple present mercs up, present participle mercing up, simple past and past participle merced up)",
      "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": "English phrasal verbs formed with \"up\"",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Video games",
          "orig": "en:Video games",
          "parents": [
            "Games",
            "Mass media",
            "Software",
            "Recreation",
            "Culture",
            "Media",
            "Computing",
            "Human activity",
            "Society",
            "Communication",
            "Technology",
            "Human behaviour",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "To hire mercenaries in a game."
      ],
      "id": "en-merc_up-en-verb-XEiZJ-9D",
      "links": [
        [
          "video game",
          "video game"
        ],
        [
          "mercenaries",
          "mercenary"
        ]
      ],
      "raw_glosses": [
        "(informal, video games) To hire mercenaries in a game."
      ],
      "tags": [
        "informal"
      ],
      "topics": [
        "video-games"
      ]
    }
  ],
  "word": "merc up"
}

{
  "forms": [
    {
      "form": "mercs up",
      "tags": [
        "present",
        "singular",
        "third-person"
      ]
    },
    {
      "form": "mercing up",
      "tags": [
        "participle",
        "present"
      ]
    },
    {
      "form": "merced up",
      "tags": [
        "participle",
        "past"
      ]
    },
    {
      "form": "merced up",
      "tags": [
        "past"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "*"
      },
      "expansion": "merc up (third-person singular simple present mercs up, present participle mercing up, simple past and past participle merced up)",
      "name": "en-verb"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English informal terms",
        "English lemmas",
        "English multiword terms",
        "English phrasal verbs",
        "English phrasal verbs formed with \"up\"",
        "English verbs",
        "en:Video games"
      ],
      "glosses": [
        "To hire mercenaries in a game."
      ],
      "links": [
        [
          "video game",
          "video game"
        ],
        [
          "mercenaries",
          "mercenary"
        ]
      ],
      "raw_glosses": [
        "(informal, video games) To hire mercenaries in a game."
      ],
      "tags": [
        "informal"
      ],
      "topics": [
        "video-games"
      ]
    }
  ],
  "word": "merc up"
}