Double Chins are a layer of subcutaneous fat around the neck that sags down and creates a wrinkle, making the owner appear to have a second chin.

It is most common for people who are elderly or obese. A person of average weight can bear a double chin as well, depending on their bone structure, amount of loose skin, and amount of fat cells in that region. It is more visible when the bottom jaw is lowered or the head is tilted down.