I have no jawline and no definition! What's my best option? (Photo)

If
you have not had any orthodontic treatment, orthognathic surgery would correct
your bite and enlarge your Jaw. Chin and jaw implants would be ideal to enlarge
your lower jaw in a single surgery and not require any braces. The adequacy of chin projection should take into account several variables including sex, the effect of occlusion on lower lip position, the thickness of the chin pad, and the depth of the labiomental fold. When these variables are not considered, implant augmentation may result in a chin that is unnatural and too large, particularly in a woman.

You have a vertically short lower third of your face. The chin is vertically short and the jaw angles are very wide. Your face could be reshaped by a vertical lengthening bony genioplasty, jaw angle reduction/shaving, neck liposuction and buccal lipectomies. This will help lengthen and narrow the lower third of your face.

 The photographs demonstrate fatty deposits in the neck, and a weak chin profile. Placement of a small Silastic chin implant will help significantly with facial balance and proportions, to enable  the chin to come forward to help with facial balance and proportions.  Liposuction of the fat in the neck can help with  giving more definition to the jawline and neck. For many examples and more information, please see the video and the link below