Idea of Tongue Out Icon
There is a circle. Inside the circle are two identical curved lines (like rainbows) aligned next to each other to form the eyes. Beneath them is a gently curved line like a smile. extending from the lower part of this line is an arc shape.
This page shows the different variations of the Tongue Out from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free.