Finally an online challenge that doesn’t involve dancing next to a moving car or eating dishwasher tablets.

The #lemonnoexpression challenge is a harmless trend gaining popularity on social media platforms.

It involves trying to chow down on a wedge or slice of lemon while trying to keep a straight face.

If the videos are anything to go by, it’s not an easy feat, with most screwing up their faces and spitting out the bitter fruit within seconds.

A similar lemon challenge emerged last year whereby participants ate a wedge of lemon and then posted their best ‘sour faces’ online to raise awareness for diffuse intrinsic pontine glioma, a type of childhood cancerous tumour.