How can I get a sharp jawline and no jiggle please? (Photos)

Thank you for your question! Just based on the picture, it looks like you would benefit from a combination of liposuction with skin tightening. This is a small procedure that could be done while you are awake with just local anesthesia and one small incision under your chin. The liposuction would permanently remove the fat and the skin tightening, such as with a laser, would tighten the skin to give you a sharper jaw line. I recommend seeing a board certified plastic surgeon in person to discuss your goals and get the optimal results.

There can be conditions causing an enlarged neck with not much fat under the skin because the fat is in the plane under the muscle. Botox does not help this.If fat is palpated above the muscle, then ThermiTight, Liposuction, Kybella, CoolSculpting and SculpSure can be tried.The information provided in Dr. Shelton's answer is for educational purposes only and is not intended to constitute medical advice.  The information provided should not be relied upon as a substitute for consultations with a qualified health professional who may be familiar with your individual medical needs. 

I would approach this in 3 ways. Reduce fat pocket in the submental area with 3-4 sessions of kybella, followed by facial volumizing with a dermal filler (this helps to recontour and address volume loss), third, I would recommend an Ultherapy session for mid face/cheeks and submental area to tighten and firm your skin (will also help to offset any skin laxity from loss of fat after kybella). In my experience when all 3 are adressed the best results happen.Best, Dr P.