girl who wears lots of Tommy H polos with capris and can often be found on yachts or other marine craft. They are also attractive and hang out with seagullars and such.
landluber 1: Hey, that girl over there looks hawt.
landluber 2: yeah she does, but she won't go for us. Look! she's heading for the marina.
landluber 1: damn, she's a seafairy going out on that old man's yacht.