LOON

Source: 566, 567

loon. Loon, n. a simple fellow, a scoundrel, a bird

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Loon (?), n. [[Scot. loun, lown, loon; akin to OD. loen a stupid man; prob. for an older lown, and akin to E. lame.]] A sorry fellow; a worthless person; a rogue.