English

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Etymology

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(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Noun

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Jack Shalloo (plural Jack Shalloos)

  1. (dated, naval slang) A (male) braggart.
    • 1932, Myrtle Johnston, The Maiden, page 194:
      A fine lad, though maybe a bit of a Jack Shalloo with the great talk.
  2. (dated, naval slang) A careless or happy-go-lucky man.
    • 1910, The Idler: An Illustrated Monthly Magazine, volume 38, page 172:
      Huh! He has just saved his ticket then. Knew to the minute, he did, when she was to cast off — asked me yesterday, he did. What the mischief does he mean by this Jack Shalloo trick? And at a time like this!