A landlubber is someone who does not know the sea or ships — a person of the shore, clumsy on a deck, unsure of ropes and waves. Sailors coined it, and it still sounds like sailor talk: playful, a little teasing, not a job title. Lubber is an old word for a clumsy, heavy person; adding land points at the one who belongs on dry ground. You might hear it from a crew to a passenger who feels sick, or in a storybook pirate voice. It is not cruel in the worst way, but it does draw a line: we are of the sea, you are not. Ordinary English has kinder pairs like ‘I'm no sailor.’ Young people rarely say landlubber unless they are joking. It does not mean someone who loves the land (that would be a land lover, which is a different shape of word), and it is not a technical word in the navy.

旱鴨子、不懂船也不懂海的人（水手口中帶點調侃的說法）。