seadog

From sea +‎ dog.

seadog (plural seadogs)

1. A sailor accustomed to the sea.

   The old seadog knew the storm was coming long before the rest of the crew were aware of it.

   • 1983, James C. H. Shen, “Rejoining the Government”, in Robert Myers, editor, The U.S. & Free China: How the U.S. Sold Out Its Ally‎, Washington, D.C.: Acropolis Books Ltd., →ISBN, →LCCN, →OCLC, page 30:

     The two admiral-ambassadors were themselves two worlds apart. Kirk, now deceased, remained very much a seadog in both speech and mannerism. He was curt and seldom smiled, while Wright, a bit hard of hearing, was always courteous.

2. A pirate.
3. (archaic) A seal. (marine mammal)
4. (heraldry) A charge resembling the talbot but with scales, webbed feet and a broad tail.
5. A dogfish.
6. (uncommon) An omen of bad luck.
7. (uncommon) A white-topped wave in an estuary.
8. (uncommon) A fogbow, as seen by mariners.

• (a seasoned sailor): old salt, salty dog, water dog

• seawolf
• waterdog

• dagoes, dosage