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.

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 ...

But what is 'mewing'? Mewing is a supposed quick-fix non-surgical beauty trend to help make your jawline appear more defined ...