1. A fold of loose skin hanging from the neck of certain animals.
2. A pendulous part similar to this, such as the wattle of a bird.
3. A fold of loose skin hanging from the neck of a person.

[Middle English dewlappe : dew, of unknown meaning (akin to Danish and Norwegian dog- , in Danish doglæbNorwegian doglæp, dewlap) + lappe, fold; see lap².]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.