Definition of Jack tar in US English:

Jack tar


informal, dated
  • A sailor.

    • ‘Are we about to sail? We are if the Blue Peter is on the masthead. Back to the ship, you jack-tars, unless you want a flogging.’
    • ‘Sailors became known as Jack Tars because of their clever use of this natural gooey substance to waterproof things.’
    seaman, seafarer, seafaring man, mariner
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Jack tar

/ˌjak ˈtär/