<https://www.webmd.com/fitness-exercise/best-exercises-defined-jawline> - Neck Curl-Up - Step 1: Lay down on your back and press your tongue to the roof of your mouth. - Step 2: Bring your chin to your chest, lifting your head about two to three inches off the ground. - Step 3: Slowly lower your head back down and repeat - - Vowel Exercises - Step 1: Open your mouth to create an “O” sound. Exaggerate the vowel to tighten the muscles. - Step 2: Then, open your mouth to create an exaggerated “E” sound. - Step 3: Repeat the “O” and “E” movements - Chin-Up The chin-up exercise lifts up the facial muscles in the lower half of your face, including your jaw. Step 1: Close your mouth and slowly push your jaw forward. Step 2: Lift up your low lip and push up until you feel the muscles in your chin and jawline stretch. Step 3: Stay in this position for about 10 seconds before repeating the exercise. Tongue Twister The tongue twister targets muscles below the chin to tone the jawline. Step 1: Place your tongue at the roof of your mouth, just behind your teeth. Step 2: Press your tongue firmly against the roof of your mouth to create tension. Step 3: Hum and make a vibrating sound to activate your muscles.