lubberly adjective 2adverb 1forms 2 adjective2 •Clumsy and stupid; resembling a lubber (an inexperienced person). •Lacking in seamanship; of or suitable to a landlubber who is new to being at sea and unfamiliar with the ways of a sailor. adverb1 •In the manner of a landlubber.I'm not ignorant of these matters, having been many years at sea—and seamen, you must know, are curious in knots; I cannot endure to see anything done lubberly. — 1839 formsmore lubberly · most lubberly