"tag along" meaning in English

{
  "etymology_text": ": → δείτε τις λέξεις tag και along",
  "forms": [
    {
      "form": "tag along"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ιδιωματισμοί (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "What are you tagging along for? No one invited you!",
          "translation": "Τι μας κόλλησες; Δε σε κάλεσε κανένας εσένα!"
        }
      ],
      "glosses": [
        "ακολουθώ απρόσκλητος, απροσκάλεστος, κολλάω"
      ],
      "id": "el-tag_along-en-verb-DWDa3vb0",
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "tag along"
}

{
  "etymology_text": ": → δείτε τις λέξεις tag και along",
  "forms": [
    {
      "form": "tag along"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "verb",
  "senses": [
    {
      "categories": [
        "Ιδιωματισμοί (αγγλικά)"
      ],
      "examples": [
        {
          "text": "What are you tagging along for? No one invited you!",
          "translation": "Τι μας κόλλησες; Δε σε κάλεσε κανένας εσένα!"
        }
      ],
      "glosses": [
        "ακολουθώ απρόσκλητος, απροσκάλεστος, κολλάω"
      ],
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "tag along"
}