Milk massages are excellent because they tighten the skin and tone, that's what you need now. Take a few tablespoons of warm milk and massage them on the chin about five minutes ago. Do this a few times a day for a few weeks.

You could also make a milk and honey mask that works just as well. Rapid Tone Diet

Tennis ball

You could play tennis to try and lose some fat around your chin, or you should just do the much simple tennis ball exercise.

http://supplement4help.com/rapid-tone-diet/