double chin
noun
: a fleshy or fatty fold under the chin
He has a spiky crew cut from the 50's over a jowly face, a double chin and a thick neck.
Pat Jordan
Pat Jordan double-chinned
ˌdə-bəl-ˈchind 
adjective At last the merchants came, some striding down King Street, rosy-faced, double-chinned, known and greeted by everyone … Esther Forbes
Esther Forbes 
Word History
First Known Use
1521, in the meaning defined above
Medical Definition
double chin
noun
: a fleshy or fatty fold under the chin
- for short
- for show
- for simplicity's sake
- for size
- for some reason
- for some reason or another
- for some reason or other
- for some strange reason
- for some time
- for some/whatever reason
- for someone's eyes only
- for someone's information
- for someone's liking
- for someone's part
- for someone's taste
- for sport
- for starters
- for storage
- for sure
- for that
- for that matter
- for the asking
- for the best
- for the better
- for the birds