Etymology
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landlubber (n.)
also land-lubber, "A useless long-shorer; a vagrant stroller. Applied by sailors to the mass of landsmen, especially those without employment" [W.H. Smyth, "The Sailor's Word-book"], c. 1700, from land (n.) + lubber (q.v.).
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lubber (n.)
mid-14c., "big, clumsy, stupid fellow who lives in idleness," from lobre, earlier lobi "lazy lout," probably of Scandinavian origin (compare Swedish dialectal lubber "a plump, lazy fellow"). But OED suggests a possible connection with Old French lobeor "swindler, parasite," with sense altered by association with lob (n.) in the "bumpkin" sense. Sometimes also Lubbard (1580s), with pejorative suffix -ard.

Since 16c. mainly a sailors' word for those inept or inexperienced at sea (as in landlubber), but earliest attested use is of lazy monks (abbey-lubber). Compare also provincial English lubberwort, name of the mythical herb that produces laziness (1540s), Lubberland "imaginary land of plenty without work" (1590s).
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