Webster's Revised Unabridged Dictionary · 1913

Dewlap

Dewlap , noun

[Dew + lap to lick.]

1.
The pendulous skin under the neck of an ox, which laps or licks the dew in grazing.
2.
The flesh upon the human throat, especially when with age. [Burlesque]
On her withered dewlap pour the ale. — Shakespeare