Emily Dickinson Lexicon

LUB'BER, n. [W. llabi, a tall lank fellow, a clumsy man, a stripling, a lubber, a looby; llab, a flag or thin strip, a stripe or stroke; llabiaw, to slap; llob, an unwieldy lump, a dull fellow. From the significations of llabi, it appears that the primary sense is tall and lank, like a stripling who gains his highth before he does his full strength, and hence is clumsy. But looby seems rather to be from llob.]

A heavy, clumsy fellow; a sturdy drone; a clown. And lingering lubber lose many a penny. – Tusser.