seadog

(noun)

noun

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.

2. (archaic) A seal (marine mammal), or a similar design in heraldry.

3. dogfish

4. (uncommon) An omen of bad luck.

5. (uncommon) A white-topped wave in an estuary.