This is a move where, when someone is giving you head, you cum in their mouth; and before they have a chance to spit it out or swallow it, you tickle them so they will laugh and the cum will spray out of their nose. Hence looking like and angry dragon.
When your grandma was blowing me, I gave her an angry dragon.
A very specific situation where you are fucking Tony Danza in the mouth, choking him. When you blow your load (and win), you yell, "I'm the boss, BITCH!" and he's so choked up (and non-responsive) that jizz shoots from his nose like dragon smoke.
Sunday night, I mouth raped Tony Danza and he spewed like an angry dragon!