loon

noun

1. a worthless lazy fellow

   noun.person

   Source: WordNet 3.0

2. large somewhat primitive fish-eating diving bird of the northern hemisphere having webbed feet placed far back; related to the grebes

   noun.animal

   Synonyms diver

   Source: WordNet 3.0

3. a person with confused ideas; incapable of serious thought

   noun.person

   Synonyms addle-head addlehead birdbrain

   Source: WordNet 3.0

4. A sorry fellow; a worthless person; a rogue.

   noun

   Source: webster1913

5. Any one of several aquatic, wed-footed, northern birds of the genus <i>Urinator</i> (formerly <i>Colymbus</i>), noted for their expertness in diving and swimming under water. The common loon, or great northern diver (<i>Urinator imber</i>, or <i>Colymbus torquatus</i>), and the red-throated loon or diver (<i>U. septentrionalis</i>), are the best known species. See <u>Diver</u>.

   noun

   Source: webster1913