I Want my Chin a Lil Bit Long. So if There is Any Exercise or Anything else for my Chin So Please Tell Me?

You likely have what's called a Class II dental malocclusion where the lower jaw is small and retruded relative to the upper jaw.  Ideally, you would have the jaw lengthened with surgery (mandibular advancement), but this requires, in most cases, orthodontic therapy.  Acceptable compromise procedures include placement of a small chin implant (be extremely careful with this---because of the bony weekness, your chin is short and there is deepening above the chin pad, so too large of an implant can further accentuate this deformity).  An alternative, and one that I favor, is what is called a "lengthening genioplasty", when the chin bone is cut, moved slightly forward and downward to actually make this area longer.  It has the secondary benefit of softening the crease of above the chin pad to create a natural appearing, longer and stronger/more masculine chin.

Good luck to you!

There are unfortunately no exercises that will change or lengthen your chin. A weak chin is the result of a relatively small mandible or sometimes can indicate occlusion problems with your teeth. If you do have a problem with your occlusion, then it is possible your would need orthodontic correction or even a larger surgery that involves cutting the mandible. If you do not have a problem with your occlusion, then a chin implant, most commonly performed with a small incision under the chin, if the best option.