walking encyclopedia

A very knowledgeable person, as in Ask Rob—he's a walking encyclopedia of military history. A similar expression, a walking dictionary, was used by George Chapman in his poem “Tears of Peace” (c. 1600).


Nearby words

  1. walking beam,
  2. walking bus,
  3. walking catfish,
  4. walking delegate,
  5. walking dragline,
  6. walking fern,
  7. walking fish,
  8. walking horse,
  9. walking leaf,
  10. walking line

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.