After giving a blowjob
, the woman takes the load in her mouth, then immediately sneezes or in some way willingly forces the semen back out through her nostrils, making it look like a dragon breathing flames. This is typically accentuated with a grunt or a roaring sneeze for added effect.
Guy: "Yo man, you get with Sam yet?"
Dude: "Yea man, she gave me the the dragon."
Guy: "No shit?"
Dude: "Yea she roared and breathed all over my junk. I survived."