Snorting
In the books there are a few references to Grabon snorting, including mucus. Generally Gordon and Heron are amused while the women are grossed out. It seems that dragons have soft snorts and then the harsh one that isi an expression of disgust. Due to their nose structures, it seems that dragons have the ability to aim projectile snot. If you could do this… would you have a target? As a teacher I thought spit balls were gross! Yeah, this is worse.