a pendulous fold of skin under the throat of a bovine animal.
any similar part in other animals, as the wattle of fowl or the inflatable loose skin under the throat of some lizards.
Origin 1350–1400;Middle Englishdew(e)lappe, apparently dewedew + lappelap1; compare Danishdog-læp,Dutch (dial.) dauw-zwengel; literal sense is unclear
Related forms dewlapped, adjective
a loose fold of skin hanging from beneath the throat in cattle, dogs, etc
loose skin on an elderly person's throat
[C14 dewlappe, from dew (probably changed by folk etymology from an earlier form of different meaning) + lap1 (from Old English læppa hanging flap), perhaps of Scandinavian origin; compare Danish doglæp]