jack-tar(n = noun.person) gob, jack, mariner, old salt, sea dog, seafarer, seaman, tar - a man who serves as a sailor;
is a kind of crewman, sailor
has particulars: able-bodied seaman, able seaman, bo's'n, bo'sun, boatswain, bos'n, bosun, deckhand, roustabout, helmsman, steerer, steersman, bargee, bargeman, lighterman, officer, ship's officer, pilot, sea lawyer, whaler