“Duck face” dominated for a long time.  That’s where you pout your lips like a duck.  But that’s old news.

To pull off scrunch face, you have to scrunch your nose, squint your eyes, and flash a grin.  If you do it right, it’s supposed to look cute.  (If you do it wrong, you look like you ate too much cheese and haven’t seen a bathroom in days.)

It’s also kind of like the face you’d make if you just bit into a lemon.  So it’s not exactly a new facial expression.

People have actually been doing it on social media for a while.  But it’s hit a point where kids do it compulsively now, without even thinking.  So it’s all over social media.