Person or person who displays selfish behaviour. Only concerned with their own wellbeing and gain. From selfish shellfish. Can be shortened to shellers.
A female's vagina aka snatch after a long day at the beach. The SaltyShellfish is noted by its aromatic qualities including an amalgam of sea water, sweat, vaginal juice, sand and dripping sunscreen and tanning oils.
Dan: Where is your girlfriend today?
Jeff: She is at the beach broooohhhh! I told her stay there all day.
Dan: Why?
Jeff: That way she would bring me home a ripe and ready Salty Shellfish. I'm eatin' me some tangy tuna tonight braaaaaahhhhhh!!!