This expression is very familiar with most all dragons. It's the simple things and complex things and even the outright 200% stupid things that can make an expression such as this exist.

This is actually not a standard badge commission as it is etched on aluminum. Stormdog Studio/Tinkering Yote are to congratulate on such a cool look and different style of badge making. First they drew the image on the metal then applied electrolytic acid and watch the stuff dissolve away except for the remaining image. Science at it's furriest.