pull through

/P UH1 L TH R UW1/
noun
  1. 1

    A length of cord about a metre long with a narrow cylindrical weight at one end and loops at the other. Used for cleaning rifle barrels, by pulling through a piece of cloth.

verb
  1. 1

    To come through pain and trouble through perseverance

  2. 2

    To clean the barrel of a firearm using a pull through

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Source: https://en.wiktionary.org/wiki/pull%20through