ice cube - definition and synonyms

noun [countable] 

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singularice cube
pluralice cubes
  1.   From our crowdsourced Open Dictionary
    2
    an ice cube’s chance in hell no chance; used for saying something is totally impossible and will never happen

    The plan has an ice cube's chance in hell of succeeding.

    Submitted by simplicissimus from Romania on 27/11/2016