"dumb as a box of rocks" meaning in English

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  "etymology_text": "Variation of dumb as a rock.",
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        "head": "(as) dumb as a box of rocks"
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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        {
          "ref": "2001 July, “Tell it to my Heart”, in CMJ New Music Monthly, →ISSN, page 29",
          "text": "The drummer in my friend's band is pretty hot, but he's dumb as a box of rocks. I hear he likes me, and I definitely don't want to date him—but is his stupidity any reason not to simply have sex with him? — Carla, Brooklyn, New York",
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      "glosses": [
        "Very stupid."
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      "raw_glosses": [
        "(simile, slang) Very stupid."
      ],
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  "word": "dumb as a box of rocks"
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  "etymology_text": "Variation of dumb as a rock.",
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  "lang_code": "en",
  "pos": "adj",
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          "ref": "2001 July, “Tell it to my Heart”, in CMJ New Music Monthly, →ISSN, page 29",
          "text": "The drummer in my friend's band is pretty hot, but he's dumb as a box of rocks. I hear he likes me, and I definitely don't want to date him—but is his stupidity any reason not to simply have sex with him? — Carla, Brooklyn, New York",
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      "glosses": [
        "Very stupid."
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      "qualifier": "simile",
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        "(simile, slang) Very stupid."
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  "word": "dumb as a box of rocks"
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