seadog

noun
Middle SchoolNot in standard dictionaries
1

A sailor accustomed to the sea.

2

A pirate.

3

A seal, especially a harbor seal. (marine mammal)

4

A charge resembling the talbot but with scales, webbed feet and a broad tail.

5

Synonym of sea puppy.

6

A dogfish.

7

An omen of bad luck.

8

A white-topped wave in an estuary.

9

A fogbow, as seen by mariners.

#archaic#informal