Definitions:

1. Historically refers to sailors, of the merchant or Royal Navy, typically British. NOUN
   • The life of jack-tars was often harsh, with long hours, meager rations, and the constant threat of danger from storms, pirates, or enemy ships.
2. Term associated with sailors due to their use of tar in maintaining the ship's riggings, which often let to their clothes being tar-stained. NOUN
   • Jack-tars were known for their love of rum, often indulging in raucous reverly upon reaching port after long and arduous journeys.

Synonyms:

• gob
• mariner
• sailor
• sea dog
• seafarer