loony, looney, luny 1. An offensive term that deliberately insults someone's intelligence and ability to act rationally. 2. someone who behaves in an eccentric or thoughtless way. 3. A shortening, informal, and alterated version of lunatic.
Type: Term Pronunciation: lū′nē Definitions: 1. Joseph M., 20th-century U.S. biochemist. See: Folin-Looney test