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1.
The skin under your jaw. Sometimes a second chin, or double chin.
Wow thats a huge Gwaddle
by Gwaddle Gwaddle July 29, 2007
 
2.
A term of endearment for a girlfriend or lover.
I love you my little gwaddle. You are so beautiful i love your gwaddle.
by John Firth June 10, 2008