"Oxo cube" meaning in English

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  "etymology_text": "Rhyming slang for Tube. Oxo is a brand of stock cubes.",
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      "form": "the Oxo cube",
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  "lang_code": "en",
  "pos": "name",
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          "ref": "1981, Peter Wright, Cockney Dialect and Slang, page 74",
          "text": "For instance, on the oxo cube 'tube' the weasler or porter has changed into the less descriptive stationman […]",
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        {
          "ref": "1993, Verbatim, volumes 20-21, page 21",
          "text": "On the Oxo Cube to London",
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        "The London Underground rail network."
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        "(Cockney rhyming slang) The London Underground rail network."
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        {
          "word": "up the Oxo Tower"
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      "wikipedia": [
        "Oxo (food)"
      ]
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  "word": "Oxo cube"
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      "form": "the Oxo cube",
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    {
      "word": "up the Oxo Tower"
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        "The London Underground rail network."
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        "Oxo (food)"
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  "word": "Oxo cube"
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