"deuce less" meaning in English

{
  "etymology_text": "From deuce, \"two year sentence,\" with less as a shortening of the phrase \"two years less a day.\"",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "deuce less",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Canadian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A sentence of two years less a day (entitling the offender to serve the sentence in a provincial institution, rather than a federal penitentiary as for sentences of two years or more)."
      ],
      "id": "en-deuce_less-en-noun-0YZAwrTH",
      "raw_glosses": [
        "(Canada, slang) A sentence of two years less a day (entitling the offender to serve the sentence in a provincial institution, rather than a federal penitentiary as for sentences of two years or more)."
      ],
      "tags": [
        "Canada",
        "slang"
      ]
    }
  ],
  "word": "deuce less"
}

{
  "etymology_text": "From deuce, \"two year sentence,\" with less as a shortening of the phrase \"two years less a day.\"",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "deuce less",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Canadian English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English slang"
      ],
      "glosses": [
        "A sentence of two years less a day (entitling the offender to serve the sentence in a provincial institution, rather than a federal penitentiary as for sentences of two years or more)."
      ],
      "raw_glosses": [
        "(Canada, slang) A sentence of two years less a day (entitling the offender to serve the sentence in a provincial institution, rather than a federal penitentiary as for sentences of two years or more)."
      ],
      "tags": [
        "Canada",
        "slang"
      ]
    }
  ],
  "word": "deuce less"
}