salty dog

Etymology 1
From the salt of the sea. Compare and.

Sexual sense may be due to association of sailors with sexual promiscuity, or may be separate development, and  both suggesting promiscuity.

Noun

 * 1)  An experienced sailor.
 * 2)  A sexually promiscuous man; a male sexual partner.
 * 1)  A sexually promiscuous man; a male sexual partner.

Translations

 * Finnish:
 * French:

Etymology 2
From a, plus salt, influenced by existing term.

Noun

 * 1) A cocktail consisting of gin or vodka, grapefruit juice, and a salt rim.