The Collaborative International Dictionary of English v.0.48:
landlubberly \landlubberly\ adj. Like a landlubber: inexperienced in seamanshap. Syn: lubberly. [WordNet 1.5]WordNet (r) 3.0 (2006):
landlubberly adj 1: inexperienced in seamanship; "of all landlubbers the most lubberly" [syn: lubberly, landlubberly]