BABBLE FISH

A fish that translates any spoken language into a language that the person possessing the fish can understand. Example: To understand the Vogons, you'll have to have a babble fish in your ear. (For those who think this should be spelled babelfish or babel fish or BabelFish or Babel Fish--guti. Douglas Adams (who died May 11, 2001) would probably have appreciated the whimsy of randomly using alternative spellings.)