Creators online claim mewing is the easy hack to define your jaw treatment-free. It involves pressing your tongue to the roof of your mouth with your teeth lightly touching and your mouth closed.

Dr Michael Mew is responsible for the 'mewing' trend, which has been adopted ... This included 'standing up straight' and maintaining a 'butterfly bite' - which involved resting the tongue on ...

Mewing, a practice advocated by social media influencers, involves placing the tongue against the roof of the mouth to achieve a chiselled jawline. However, experts dismiss its effectiveness ...