I was reading an article in a scientific magazine recently and I came across the word land lubber. Ooh, say it ain't so! I've (thought?) heard pirates on cartoons accuse the people on the shore of being land lovers, but that's the only time I'd ever heard the use of the phrase. Does this horrible land lubber derive from a mispronunciation of land lover? Why would such become a valid dictionary entry? (M-W says the word means Landsman.)